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  • iPhone smooth move and pinch of UIImageView

    - by Jacob
    I have an image view that I'm wanting to be able to move around, and pinch to stretch it. It's all working, but it's kinda jumpy when I start to do any pinch movements. The position will jump back and forth between the two fingers. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { startLocation = [[touches anyObject] locationInView:mouth_handle]; if([touches count] == 2) { NSArray *twoTouches = [touches allObjects]; UITouch *first = [twoTouches objectAtIndex:0]; UITouch *second = [twoTouches objectAtIndex:1]; initialDistance = distanceBetweenPoints([first locationInView:mouth_handle],[second locationInView:mouth_handle]); } } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { CGPoint pt = [[touches anyObject] locationInView:mouth_handle]; CGRect frame = [mouth_handle frame]; frame.origin.x += pt.x - startLocation.x; frame.origin.y += pt.y - startLocation.y; frame.origin.x = (frame.origin.x < 58) ? 58 : frame.origin.x; frame.origin.x = (frame.origin.x > (260 - mouth_handle.frame.size.width)) ? (260 - mouth_handle.frame.size.width) : frame.origin.x; frame.origin.y = (frame.origin.y < 300) ? 300 : frame.origin.y; frame.origin.y = (frame.origin.y > 377) ? 377 : frame.origin.y; if(frame.origin.x - prevDistanceX > 2 && frame.origin.x - prevDistanceX < -2) frame.origin.x = prevDistanceX; if(frame.origin.y - prevDistanceY > 2 && frame.origin.y - prevDistanceY < -2) frame.origin.y = prevDistanceY; prevDistanceX = frame.origin.x; prevDistanceY = frame.origin.y; CGFloat handleWidth = mouth_handle.frame.size.width; if([touches count] == 2) { NSArray *twoTouches = [touches allObjects]; UITouch *first = [twoTouches objectAtIndex:0]; UITouch *second = [twoTouches objectAtIndex:1]; CGFloat currentDistance = distanceBetweenPoints([first locationInView:mouth_handle],[second locationInView:mouth_handle]); handleWidth = mouth_handle.frame.size.width + (currentDistance - initialDistance); handleWidth = (handleWidth < 60) ? 60 : handleWidth; handleWidth = (handleWidth > 150) ? 150 : handleWidth; if(initialDistance == 0) { initialDistance = currentDistance; } initialDistance = currentDistance; } mouth_handle.frame = CGRectMake(frame.origin.x, frame.origin.y, handleWidth, 15); } Any thoughts on how to make this smoother?

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  • iPhone Orientation Relayout From Single Column to Double Column

    - by kkrizka
    I am trying to create a UIView in Interface Builder that shows to the user two boxes containing some text. This UIView should support both landscape and portrait modes. When in portrait orientation, the two boxes should be centered horizontally and be under each other. Like in the picture below: But when in landscape orientation, it should show the two boxes centered vertically and by side by side. Like in the picture below: Is this possible using only the autosizing options (or any other IB options), or do I have to relayout the view in code on orientation change events? I would prefer using only IB. I tried locking the top and left margins of the top box and locking the bottom and right margins of the bottom box. But the problem is that for it to work I also need to shrink the two boxes as one changes from portrait to landscape, because otherwise they would overlap.

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  • javascript scroll event for iPhone/iPad ?

    - by _ck_
    I can't seem to capture the scroll event on an iPad. None of these work, what I am doing wrong? window.onscroll=myFunction; document.onscroll=myFunction; window.attachEvent("scroll",myFunction,false); document.attachEvent("scroll",myFunction,false); They all work even on Safari 3 on Windows. Ironically, EVERY browser on the PC supports window.onload= if you don't mind clobbering existing events. But no go on iPad.

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  • Justifying UIVIews on the iPhone: Algorithm Help

    - by coneybeare
    I have been messing around with a way to justify align a collection of UIView subclasses within a containing view. I am having a little bit of trouble with the algorithm and was hoping someone could help spot my errors. Here is pseudocode of where I am now: // 1 see how many items there are int count = [items count]; // 2 figure out how much white space is left in the containing view float whitespace = [containingView width] - [items totalWidth]; // 3 Figure out the extra left margin to be applied to items[1] through items[count-1] float margin = whitespace/(count-1); // 4 Figure out the size of every subcontainer if it was evenly split float subcontainerWidth = [containingView width]/count; // 5 Apply the margin, starting at the second item for (int i = 1; i < [items count]; i++) { UIView *item = [items objectAtIndex:i]; [item setLeftMargin:(margin + i*subcontainerWidth)]; } The items do not appear to be evenly spaced here. Not even close. Where am I going wrong? Here is a shot of this algorithm in action: EDIT: The code above is pseudocode. I added the actual code here but it might not make sense if you are not familiar with the three20 project. @implementation TTTabStrip (JustifiedBarCategory) - (CGSize)layoutTabs { CGSize size = [super layoutTabs]; CGPoint contentOffset = _scrollView.contentOffset; _scrollView.frame = self.bounds; _scrollView.contentSize = CGSizeMake(size.width + kTabMargin, self.height); CGFloat contentWidth = size.width + kTabMargin; if (contentWidth < _scrollView.size.width) { // do the justify logic // see how many items there are int count = [_tabViews count]; // 2 figure out how much white space is left float whitespace = _scrollView.size.width - contentWidth; // 3 increase the margin on those items somehow to reflect. it should be (whitespace) / count-1 float margin = whitespace/(count-1); // 4 figure out starting point float itemWidth = (_scrollView.size.width-kTabMargin)/count; // apply the margin for (int i = 1; i < [_tabViews count]; i++) { TTTab *tab = [_tabViews objectAtIndex:i]; [tab setLeft:(margin + i*itemWidth)]; } } else { // do the normal, scrollbar logic _scrollView.contentOffset = contentOffset; } return size; } @end

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  • Setting ivar in objective-c from child view in the iPhone

    - by Ivan
    Hi there! Maybe a FAQ at this website. I have a TableViewController that holds a form. In that form I have two fields (each in it's own cell): one to select who paid (single selection), and another to select people expense is paid for (multiple selection). Both fields open a new TableViewController included in an UINavigationController. Single select field (Paid By) holds an object Membership Multiple select field (Paid For) holds an object NSMutableArray Both vars are being sent to the new controller identically the same way: mySingleSelectController.crSelectedMember = self.crPaidByMember; myMultipleSelectController.crSelectedMembers = self.crSelectedMembers; From Paid for controller I use didSelectAtIndexPath method to set a mutable array of Memberships for whom is paid: if ([[tableView cellForRowAtIndexPath:indexPath] accessoryType] == UITableViewCellAccessoryCheckmark) { [self.crSelectedMembers removeObject:[self.crGroupMembers objectAtIndex:indexPath.row]]; //... } else { [self.crSelectedMembers addObject:[self.crGroupMembers objectAtIndex:indexPath.row]]; //... } So far everything goes well. An mutable array (crSelectedMembers) is perfectly set from child view. But... I have trouble setting Membership object. From Paid By controller I use didSelectAtIndexPath to set Membership: [self setCrSelectedMember:[crGroupMembers objectAtIndex:indexPath.row]]; By NSlogging crSelectedMember I get the right selected member in self, but in parent view, to which ivar is pointed, nothing is changed. Am I doing something wrong? Cause I CAN call the method of crSelectedMembers, but I can't change the value of crSelectedMember.

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  • iPhone -- MKReverseGeocoder.adminstrativeArea -- getting state abbreviation

    - by rayjohannessen
    In the documentation for MKReverseGeocoder, the administrativeArea property gives you the current state the user is in, and it mentions in an example that it returns EITHER the state name OR its abbreviation. I am wondering if anyone knows how to get the abbreviation instead of the full state name...I have been able to find nothing that shows this is even a possibility besides that brief example that doesn't mention HOW. Thanks!

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  • iPhone SQLite Password Field Encryption

    - by Louis Russell
    Good Afternoon Guys and Girls, Hopefully this will be a quick and easy question. I am building an App that requires the user to input their login details for an online service that it links to. Multiple login details can be added and saved as the user may have several accounts that they would like to switch between. These details will be stored in an SQLite database and will contain their passwords. Now the questions are: 1: Should these passwords be encrypted in the database? My instinct would say yes but then I do not know how secure the device and system is and if this is necessary. 2: If they should be encrypted what should I use? I think encrypting the whole database file sounds a bit over-kill so should I just encrypt the password before saving it to the database? If this is case what could I use to achieve this? I have found reference to a "crypt(3)" but am having trouble finding much about it or how to implement it. I eagerly await your replies!

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  • How to change UIBarButtonItem Title - iPhone SDK

    - by user340226
    Hi Can anyone help me in that I am only trying to change the Title on an UIBarButtonItem from a different class. My code is: -(IBAction)spanishPush { SafetyTalks *bbiTitle= [[SafetyTalks alloc]init]; bbiTitle.bbiOpenPopOver.title = @"Spanish"; } SafetyTalks = the class I am trying to reference bbiOpenPopOver = the UIBarButtonItem. I can change the Title when in the SafetyTalks class by simple: bbiOpenPopOver.title = @"Talk Topics"; but cannot do it when I am out of that class. Please help. Andy

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  • handleOpenURL not called using a custom url schema in iPhone OS

    - by favo
    Hi, I have successfuly added my own url schemes to my App. The App correctly launches using the schemes. Now I want to handle the incoming data but the delegate is not called. It is an universal app and I have added the following function to both AppDelegates: - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url { if (!url) { return NO; } NSString *URLString = [url absoluteString]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"test message", nil) message:URLString delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil]; [alert show]; [alert release]; return YES; } I am testing with a schema like: myapp://appalarm.com …and would expect to be appalarm.com in the URLString What is wrong with it? Thanks for your responses!

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  • How to know when StatusBar size changed (iPhone)

    - by JOM
    I have UITabBarController with 2 tabs. One resizes just fine, when StatusBar size changes (emulator "Toggle In-Call Status Bar" menu item). The other one doesn't. The problematic tab item contains a static view, which dynamically loads one or another view depending on certain things. While getting this setup working I discovered that main tab view did NOT automagically send e.g. viewWillAppear and viewWillDisappear messages to my dynamic subviews. Apple docs explained this was because dynamically added views were not recognized by the system. @interface MyTabViewController : UIViewController { UIView *mainView; FirstViewController *aController; SecondViewController *bController; } ... if (index == 0) { self.aController = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil]; [self.mainView addSubview:aController.view]; [self.aController viewWillAppear:YES]; } How can I get StatusBar size changed event into my dynamic subviews? The "didChangeStatusBarFrame" doesn't work, as documented elsewhere.

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  • iPhone UIView frame animation inconsistent why?

    - by Rick
    I have an app that uses an image loaded in from an UIImagePickerController instance. Once the picker is dismissed so as to reduce the jarring transition from the picker layout to the layout of the next function I initially have the UIImageView for the image fill the whole screen and then when the picker is dismissed the image 'squeezes' up to the top left of the screen. from the initWithFrame... targetPicView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 480.0)]; [targetPicView setContentMode:UIViewContentModeScaleToFill]; this in a function called after dismissing the picker... [UIView beginAnimations:@"squeeze" context:context]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationDuration:0.75]; [targetPicView setFrame:CGRectMake(20.0, 20.0, 130.0, 150.0)]; [UIView commitAnimations]; The weird thing is that this works great when the image has been chosen from the library, the view shrinks down with the top left corner in place just as I planned but... If the image comes from the camera then the view shrinks with the top right corner in place instead and appears to come in from the left side of the screen. Can anyone shed any light on this?

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  • iPhone UI addSubview causing concurrency exception

    - by Eli
    This is really odd... I run my app, and while it is opening and the views are constructing I get: Collection <CALayerArray: 0x124650> was mutated while being enumerated. The code trace goes through the following: main UIApplicationMain -[UIApplication _run] CFRunLoopRunInMode CFRunLoopRunSpecific _UIApplicationHandleEvent -[UIApplication sendEvent:] -[UIApplication handleEvent:withNewEvent:] -[UIApplication _runWithURL:sourceBundleID:] -[UIApplication _performInitilizationWithURL:sourceBundleID:] -[AppDelegate applicationDidFinishLaunching:] +[Controller initializeController] //This is my own function [window addSubview: pauseMenuController.view] //This is the last point of my code it goes through -[UIView(Hierarchy) addSubview:] -[UIView(Internal) _addSubview:positioned:relativeTo:] -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:] -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] _NSFastEnumerationMutationHandler objc_exception_throw I've run the game lots and lots and lots of times and I've never seen this, then suddenly it popped up. The weird thing is that I'm not creating any other threads (that I know of) until after this code all gets called. It'll be easier for me to debug this if someone can give me some explanation of what might be getting modified while it's being accessed in a UIView. Does it have something to do with adding something to the view while it's already adding something, maybe? Any ideas?

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  • Variable Scope Problem, iPhone

    - by Stumf
    Hello all, I need some help here so I will do my best to explain. I have worked on this all day and had no success (just learning!) I have: NSArray *getValue(NSString *iosearch) { ................................. ................................... \\ More code here } - (NSString *) serialnumber { NSArray *results = getValue(@"serial-number"); if (results) return [results objectAtIndex:0]; return nil; } - (NSString *) backlightlevel { NSArray *results = getValue(@"backlight-level"); if (results) return [results objectAtIndex:0]; return nil; } I have a tableView set up and want to display my array in it so I then have: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {............. ......................................................... cell.text = [results objectAtIndex:indexPath.row]; // error results undeclared here return cell; } The problem is I get results undeclared as indicated above. I also can't figure how I could get serialnumber and backlightlevel to display on the click of a button or even at load. My attempts have thrown back errors like error: 'serialnumber' undeclared (first use in this function) and warnings like warning: 'return' with a value, in function returning void. Sorry for the long question! Many thanks, Stuart

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  • Pesky compiler error on iPhone app

    - by RexOnRoids
    Trying to get MGTwitterEngine app to build. Getting one pesky error. The following ERROR. ld warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libxml2.dylib, missing required architecture i386 in file ld warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libobjc.A.dylib, missing required architecture i386 in file ld warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libSystem.dylib, missing required architecture i386 in file ld: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libobjc.A.dylib, missing required architecture i386 in file collect2: ld returned 1 exit status

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  • iPhone: UIImagePickerController Randomly Fails to Take Picture

    - by pion
    I use a UIPickerViewController to take picture. It works 80% but seemingly at random it fails to take a picture. In tracing the code I found out that it occasionally goes to -PinRecordNewTableViewController:viewDidUnload. That is where it fails because it set nil to all ivars. @interface PinRecordNewTableViewController : UITableViewController { } ... @implementation PinRecordNewTableViewController ... - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { ... PinRecordNewPicture *pinRecordNewPicture = [[PinRecordNewPicture alloc] initWithNibName:@"PinRecordNewPicture" bundle:nil]; pinRecordNewPicture.delegate = self; [self.navigationController pushViewController:pinRecordNewPicture animated:YES]; [pinRecordNewPicture release]; ... } @interface PinRecordNewPicture : UIViewController ... @implementation PinRecordNewPicture ... - (void)picturePicker:(UIImagePickerControllerSourceType)theSource { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = theSource; picker.allowsEditing = YES; [self presentModalViewController:picker animated:YES]; [picker release]; } - (IBAction) takePicture:(id)sender { UIImagePickerControllerSourceType source = UIImagePickerControllerSourceTypeCamera; if ([UIImagePickerController isSourceTypeAvailable:source]) { [self picturePicker:source]; } What did I do wrong? Did I miss something that causes it to behave "randomly"? Thanks in advance for your help.

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  • Using iphone accelerometer AND UIEventSubtypeMotionShake event simultaneousluy.

    - by lukya
    Hi, I am using accelerometer to move/change things on the screen in my app. I also need to detect UIEventSubtypeMotionShake in the view controller for some other animations. As my app is a simple view based app, there is just one view controller which acts as UIAccelerometerDelegate AND FirstResponder (for detecting the shake event). After the first Shake gesture is detected, I don’t need accelerometer inputs through [accelerometer didAccelerate] method so I set the accelerometer delegate to nil. -(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event { if (motion == UIEventSubtypeMotionShake) { NSLog(@"shake"); [[UIAccelerometer sharedAccelerometer] setDelegate:nil]; //my shake handling code } } The problem is that the first shake motion is not being detected correctly. I have to shake 2 3 or more times to trigger the UIEventSubtypeMotionShake event, while the subsequent shakes, after the accelerometer delegate is made nil, are being detected perfectly. This must be happening because UIEventSubtypeMotionShake in turn depends on the accelerometer didAccelerate events which are being overridden by my code. But I need to use both the events. Are there any apps or code samples which use both accelerometer and UIEventSubtypeMotionShake simultaneously? Thanks Swapnil

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  • iphone Three20 TTMessageController Address Book

    - by Ward
    Hey there, I'm trying to use the TTMessageController from Three20 to send messages through a custom web service. I'm not clear on how I can incorporate contacts from the user's address book. I see the model mock address book in the sample app, but the sample only contains names. Is there a way to set the datasource of TTMessageController to be the address book? Thanks, Howie

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  • parsing HTML on the iPhone

    - by Ben Alpert
    Can anyone recommend a C or Objective-C library for HTML parsing? It needs to handle messy HTML code that won't quite validate. Does such a library exist, or am I better off just trying to use regular expressions?

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  • TTNavigator doesn't use existing navigation bar (iPhone)

    - by user220770
    I am using the three20 framework in one view controller of my App. I create TTNavigator object and open a url which works fine. The problem is that TT creates it's own navigation bar and does not use the existing bar. There is no back button on the new nav bar so I cannot go back to my previous view controller. Has anybody run into this issue? Any ideas on how to fix (besides not using three20)? Thanks

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  • iPhone modalView unwanted offset

    - by Chonch
    Hey, I have a UITabBarController with three view controllers (from three different types). On one of the view controllers, I want to display a modalViewController. Once a UIButton on the screen is pressed, I perform this action: AboutViewController *modalViewController = [[AboutViewController alloc] initWithNibName:@"AboutScreen" bundle:nil]; [self presentModalViewController:modalViewController animated:YES]; like I always do in order to display a modal view... The problem is, that while the modal view is being displayed (while it is moving from the bottom of the screen), a 20 pixels grey strip is showing on the bottom of the screen (the same size as the status bar on the top). Once the modal view reaches its final location, the strip disappears. Needless to say this doesn't look good (to say the least). Does anybody know why this may happen? Thanks,

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  • C++ from SpeakHere in iPhone app

    - by niklassaers
    Hi guys, I've made a template app where I've grabbed the recording part of the SpeakHere example and removed the file handling part, but I'm struggeling to get the C++ part of the app working right. As soon as it enters the C++ class, it gets syntax errors. If I don't import the header files from C++ (and then of course don't use the code) into my Objective C classes, all works fine. I cannot see the difference between how I'm doing it and the example is doing it. Can you see the difference? I've posted the entire code here: http://github.com/niklassaers/testFFT The build errors I get are: testFFT/CAStreamBasicDescription.h:91:0 testFFT/CAStreamBasicDescription.h:91: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'CAStreamBasicDescription' testFFT/CAStreamBasicDescription.h:298:0 testFFT/CAStreamBasicDescription.h:298: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token testFFT/CAStreamBasicDescription.h:299:0 testFFT/CAStreamBasicDescription.h:299: error: expected '=', ',', ';', 'asm' or '__attribute__' before '==' token testFFT/CAStreamBasicDescription.h:301:0 testFFT/CAStreamBasicDescription.h:301: error: expected '=', ',', ';', 'asm' or '__attribute__' before '!=' token testFFT/CAStreamBasicDescription.h:302:0 testFFT/CAStreamBasicDescription.h:302: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<=' token testFFT/CAStreamBasicDescription.h:303:0 testFFT/CAStreamBasicDescription.h:303: error: expected '=', ',', ';', 'asm' or '__attribute__' before '>=' token testFFT/CAStreamBasicDescription.h:304:0 testFFT/CAStreamBasicDescription.h:304: error: expected '=', ',', ';', 'asm' or '__attribute__' before '>' token testFFT/CAStreamBasicDescription.h:307:0 testFFT/CAStreamBasicDescription.h:307: error: expected ';', ',' or ')' before '&' token testFFT/CAXException.h:65:0 testFFT/CAXException.h:65: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'CAX4CCString' testFFT/CAXException.h:87:0 testFFT/CAXException.h:87: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'CAXException' testFFT/AQRecorder.h:59:0 testFFT/AQRecorder.h:59: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'AQRecorder' testFFT/RecorderLink.h:57:0 testFFT/RecorderLink.h:57: error: expected specifier-qualifier-list before 'AQRecorder' testFFT/RecorderLink.h:62:0 testFFT/RecorderLink.h:62: error: expected specifier-qualifier-list before 'AQRecorder' Any idea what's going on here? Cheers Nik

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  • iphone dev - could clone ABRecord ?

    - by Jeff
    Hi, I want to delete one ABPerson (say, person) in address book then add another one (say new), since some parts of attributes may be reused, I want to clone 'person' to 'new', here is my question, it seems there is NO function to do this clone, I found ABRecordCreateCopy but it seems to be MAC specified, Is there any api I could use to avoid copy each properties one by one ? Thanks in advance! Jeff

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  • programmatically change device orientation in iphone

    - by iPhoneDev
    I have navigation based app, when I click on any row in root view, the next view should come in Landscape mode. I am not able to find a proper way to implement this. What I tried is: - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return UIInterfaceOrientationIsLandscape(interfaceOrientation); } But this is not working. The view should open only in Landscape mode (not when user rotate it). Can any one help me. Thanks

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