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  • UITableViewController setting delegates and datasource

    - by the_great_monkey
    Hi iOS gurus, I'm a little bit confused about UITableViewController... As far as I concern they are typically the delegate and datasource of the UITableView (although it can be made such that they are different). However in some cases, like when embedding a UITableViewController in a UITabBarViewController in Interface Builder, we initiate our table view controller in IB. Therefore in my understanding, the default initialiser is being called. But in this case, I have this piece of code: @interface Settings : UITableViewController { } And in the IB I see that the delegate and datasource of the UITableView is hooked up to this class. My question is, why is it that we don't need to explicitly say that it is following: @interface Settings : UITableViewController <UITableViewDelegate, UITableViewDataSource> { } And in the .m file: - (void)viewDidLoad { [super viewDidLoad]; [tableView setDelegate:self]; [tableView setDataSource:self]; } I have indeed stumbled upon some cases where I have to explicitly code the above a few times to make something work. Although it is still a mystery for me as of why it is needed...

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  • "Warning reaching end of non-void fuction" with Multiple Sections that pull in multiple CustomCells

    - by Newbyman
    I'm getting "Reaching end of non-void function" warning, but don't have anything else to return for the compiler. How do I get around the warning?? I'm using customCells to display a table with 3 Sections. Each CustomCell is different, linked with another viewcontroller's tableview within the App, and is getting its data from its individual model. Everything works great in the Simulator and Devices, but I would like to get rid of the warning that I have. It is the only one I have, and it is pending me from uploading to App Store!! Within the - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {, I have used 3 separate If() statements-(i.e.==0,==1,==2) to control which customCells are displayed within each section throughout the tableview's cells. Each of the customCells were created in IB, pull there data from different models, and are used with other ViewController tableViews. At the end of the function, I don't have a "cell" or anything else to return, because I already specified which CustomCell to return within each of the If() statements. Because each of the CustomCells are referenced through the AppDelegate, I can not set up an empty cell at the start of the function and just set the empty cell equal to the desired CustomCell within each of the If() statements, as you can for text, labels, etc... My question is not a matter of fixing code within the If() statements, unless it is required. My Questions is in "How to remove the warning for reaching end of non-void function-(cellForRowAtIndexPath:) when I have already returned a value for every possible case: if(section == 0); if(section == 1); and if(section == 2). *Code-Reference: The actual file names were knocked down for simplicity, (section 0 refers to M's, section 1 refers to D's, and section 2 refers to B's). Here is a sample Layout of the code: //CELL FOR ROW AT INDEX PATH: -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { //Reference to the AppDelegate: MyAppDelegate *appDelegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate]; //Section 0: if(indexPath.section == 0) { static NSString *CustomMCellIdentifier = @"CustomMCellIdentifier"; MCustomCell *mCell = (MCustomCell *)[tableView dequeueReusableCellWithIdentifier:CustomMCellIdentifier]; if (mCell == nil) { NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"MCustomCell" owner:tableView options:nil]; for (id oneObject in nib) if ([oneObject isKindOfClass:[MCustomCell class]]) mCell = (MCustomCell *)oneObject; } //Grab the Data for this item: M *mM = [appDelegate.mms objectAtIndex:indexPath.row]; //Set the Cell [mCell setM:mM]; mCell.selectionStyle =UITableViewCellSelectionStyleNone; mCell.root = tableView; return mCell; } //Section 1: if(indexPath.section == 1) { static NSString *CustomDCellIdentifier = @"CustomDCellIdentifier"; DCustomCell *dCell = (DCustomCell *)[tableView dequeueReusableCellWithIdentifier:CustomDaddyCellIdentifier]; if (dCell == nil) { NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"DCustomCell" owner:tableView options:nil]; for (id oneObject in nib) if ([oneObject isKindOfClass:[DCustomCell class]]) dCell = (DCustomCell *)oneObject; } //Grab the Data for this item: D *dD = [appDelegate.dds objectAtIndex:indexPath.row]; //Set the Cell [dCell setD:dD]; //Turns the Cell's SelectionStyle Blue Highlighting off, but still permits the code to run! dCell.selectionStyle =UITableViewCellSelectionStyleNone; dCell.root = tableView; return dCell; } //Section 2: if(indexPath.section == 2) { static NSString *CustomBCellIdentifier = @"CustomBCellIdentifier"; BCustomCell *bCell = (BCustomCell *)[tableView dequeueReusableCellWithIdentifier:CustomBCellIdentifier]; if (bCell == nil) { NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"BCustomCell" owner:tableView options:nil]; for (id oneObject in nib) if ([oneObject isKindOfClass:[BCustomCell class]]) bCell = (BCustomCell *)oneObject; } //Grab the Data for this item: B *bB = [appDelegate.bbs objectAtIndex:indexPath.row]; //Set the Cell [bCell setB:bB]; bCell.selectionStyle =UITableViewCellSelectionStyleNone; bCell.root = tableView; return bCell; } //** Getting Warning "Control reaches end of non-void function" //Not sure what else to "return ???" all CustomCells were specified within the If() statements above for their corresponding IndexPath.Sections. } Any Suggestions ??

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  • drag object vertically

    - by blacksheep
    i like to drag this object vertically instead of horizontally, which is doin it now: (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint location = [touch locationInView:touch.view]; if (CGRectContainsPoint(myObject.frame, location)){ CGPoint xLocation = CGPointMake(location.x, myObject.center.y); myObject.center = xLocation; } }

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  • iPhone App takes up too much memory

    - by Stephen Furlani
    Ok, so here's my problem. My iPhone app is 1.2MB on disk. Granted I have a bunch of Images for the GUI buttons and backgrounds, etc. In-memory, my app takes up a whopping 15MB! That means if I then take a picture with the camera, 8MB default, it gives a memory warning (several) even before the picker calls its delegate! How can I tell what is grabbing so much memory, and how to remove it? I've removed all of my debugging symbols and added [-Os], but it still takes up a huge amount of memory! Also, (how) can I change the default resolution of the camera?

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  • Should I use interface builder or not?

    - by Michael Waterfall
    I'd like to know more about the pros and cons of using interface builder when developing iPhone/iPad apps. I've written a fairly complex and customized app that's on the app store right now, but all of the interfaces are hand coded as they are fairly complex. I've customised the navigation and tab bars with backgrounds, table view cells are manually drawn for speed, and some views are complex and scalable with many subviews. I'm pondering whether or not to start using interface builder but I'm not sure to what extent I'll use it and whether it's worth it at all. Is it quicker? Can things still be easily customised? Any advice would be most welcome!

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  • Visual Studio Shell Based Application

    - by nils_gate
    My new project would be a custom IDE for proprietary Application creation. This can be a Shell based application on VS Shell. I wanted to know what are the license requirement for these kind of applications. My question: If I create my project as VS Shell based Application, what kind of license is required by the end user of the Shell based application?

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  • handling broadcast reciver

    - by rayman
    Hi, I have an app which has MainActivity(without gui.. please just flow with it:) ) now this MainActivity running a service, this service using sendBroadcast() in order to comunnicate with the MainActivity.. now ofcourse i need to registerReceiver in the onResume() of the MainActivity. but i also need to add unregisterReceiver(receiver) in the onDestroy() of the MainActivity. problem is: when i first start that app i need it to up the service, and i dont want the user to lose focus, so i press finish() after i`am starting the service.. but then auto invoked also unregisterReceiver(receiver).. and this is not good for me.. i get error it's said it couldnt find any registerd reciver. so i fixed it by delete this line.. but i am sure its going to 'revenege' me in the future, when/where could i have problem if i wont use unregisterReceiver(receiver).. at the onDestroy() thanks, ray.

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  • Keyboard problem on iPhone OS 4.0 (8A248c)

    - by Newbee
    Hi! I have view with text field -- subclassed from UIAlertView. In the textFieldShouldReturn delegate I call resignFirstResponder for text field and dismissWithClickedButtonIndex for view. On the 3.x version everything fine, but on 4.0 keyboard still present on screen after view dismissing and doesn't disappear while app running. App compiled for 3.0 target and tested on 4.0 iPhone OS. One more thing - sometimes after dismissing alert - Done button on the keyboard replaces with Return button.. Any suggestions ?

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  • Detecting when a cell's detail-disclosure button has been clicked (when using a custom cell XIB)

    - by Gloria
    1 if (cell == nil) 2 { 3 [[NSBundle mainBundle] loadNibNamed:@"TVCell" owner:self options:nil]; 4 cell = tvCell; 5 self.tvCell = nil; 6 } There's some code from an Apple example of using your own "custom cell XIB" to create cells in a UITableView. It appears to work... but I think I would do better to actually UNDERSTAND what is being done there. Why isn't line #3 assigning the value TO something? cell = [[NSBundle mainBundle] loadNibNamed:@"TVCell" owner:self options:nil]; (In fact, cell and tvCell aren't being used at all.) Why is line #4 assigning using tvCell when nothing has been put it in at all, yet? Why is line #5 nulling out the tvCell that I need? Why is "@property (nonatomic, assign) IBOutlet UITableViewCell *tvCell;" using assign, not retain? About the only thing I can't get working correctly is when I put a disclosure-button on my custom cell XIB. Is there a way for me to detect when the user has clicked on it? (Hopefully, without using 100s of TAGs.)

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  • How to set an alarm to fire properly at fixed time?

    - by Pentium10
    I have this code Calendar c = new GregorianCalendar(); c.add(Calendar.DAY_OF_YEAR, 1); c.set(Calendar.HOUR_OF_DAY, 23); c.set(Calendar.MINUTE, 22); c.set(Calendar.SECOND, 0); c.set(Calendar.MILLISECOND, 0); // We want the alarm to go off 30 seconds from now. long firstTime = SystemClock.elapsedRealtime(); firstTime += 30*1000; long a=c.getTimeInMillis(); // Schedule the alarm! AlarmManager am = (AlarmManager)ctx.getSystemService(Context.ALARM_SERVICE); am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, c.getTimeInMillis(), 1*60*60*1000, sender); It is not executed at 23:22h What I am doing wrong? I noticed firstTime and c.getTimeInMillis() differs a lot in size and length. When I use firstTime, so when set to 30 seconds, the alarm is executed well.

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  • Does iOS 4 Have "Real" Multitasking?

    - by pkulak
    Ever since the first beta came out I've been trying to find out if "real" multitasking is possible. I.E., can you put a program in the background and have it hang on to a network connection indefinitely? I'm thinking about IM or IRC apps, for example. I've compiled an app myself on OS 4, and without changing a thing it appeared to stay running in the background, but for all I know it was just suspended to memory. The docs say the best you can do is request up to 10 minutes, but in the developer presentation they showed off Skype sitting in the background and then notifying the user that a call was coming in. Does anyone know for sure how this is all going to work?

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  • How to read book within my application in iPAD?

    - by chaitanya
    Hi, I am developing an iPAD application, Which will download the books from the server to my application, how can I read books within my application and i need to implement commenting for the same? Can anyone tell me reading books within my application (format of the book is not a problem pdf or epub anything.) i want to know does is there any way read anyone kind of these books to read within my application?

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  • Question about varrying top margin when using custom Fonts on the iPhone.

    - by user170030
    I am using FontLabel to display varying lengths of texts in a custom font. I size the FontLabel using the following : CGSize size = [myString sizeWithFont:[UIFont systemFontOfSize:[[[UIApplication sharedApplication] delegate] getFontSize]] constrainedToSize:CGSizeMake(290, 4000) lineBreakMode:UILineBreakModeWordWrap]; For some reason, this always presents a Fontlabel where the text starts at a different space from the top. Sometimes the text begins at the correct location. Other times, it appears either too high or too low. Would appreciate some help in how to solve this issue.

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  • setDelegate explanation

    - by mac
    Hi i am new to iphone developement , can any one explain me , why setDelegate is used, where we should use it. [request setDelegate:sender]; thanks in advance.

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  • Objective - C, fastest way to show sequence of images in UIImageView

    - by Almas Adilbek
    I have hundreds of images, which are frame images of one animation (24 images per second). Each image size is 1024x690. My problem is, I need to make smooth animation iterating each image frame in UIImageView. I know I can use animationImages of UIImageView. But it crashes, because of memory problem. Also, I can use imageView.image = [UIImage imageNamed:@""] that would cache each image, so that the next repeat animation will be smooth. But, caching a lot of images crashed app. Now I use imageView.image = [UIImage imageWithContentsOfFile:@""], which does not crash app, but doesn't make animation so smooth. Maybe there is a better way to make good animation of frame images? Maybe I need to make some preparations, in order to somehow achieve better result. I need your advices. Thank you!

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  • iPhone Custom CA certificate for an application which uses NSURLConnection?

    - by jr
    I have an application which is communicating with many different sites and each site has its own SSL certificate signed by our own internal CA. Doing this prevents us the need from purchasing SSL certificates for each site (hundreds or thousands) and is more secure then using a wildcard certificate with a shared key on each of those sites. So, basically using a CA certificate is the only way. Right now, I have a mobileprovision file which will install the CA certificate as a profile on the phone. When our iPhone application launches if it gets an SSL Certificate error it redirects to a this mobile provision file via Safari and the user will be prompted to install the CA. The problem is that I am concerned that the Apple AppStore might deny my app for doing this (Just some feedback from other developers at this point), and I wanted to research other ways to accomplish this. Basically what I need to accomplish is allow an SSL connection which will verify against a custom CA certificate which will be embedded in my application. This will make the CA certificate active for only the calls I make. I am using the standard NSURLConnection methods in order to communicate with the service. Is this possible? Can someone show me how to load the CA (what form PEM?) and add it to the list of trusted CA certificates for my application? If that is not possible what other options do I have? Just trusting all certificates isn't really any option, we want to prevent man in the middle attacks and only trust our CA issued certificates. Thanks!

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  • When I debug my application I get frequently Launch error: Failed to connect to remote VM

    - by Pentium10
    When I debug my application I get frequently Launch error: Failed to connect to remote VM even If I try again it doesn't help, I need to restart Eclipse. Edit Not sure yet fully if the symptoms have to do with the fact that I get this error only when I launch Debug without a code modification. Whenever I do a modification to the source code and hit Debug it goes through, but if I don't it doesn't.

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  • On iPhone, how do I check once per day to see if i should phone-home?

    - by Jann
    I want to check a file on the server only once each day (NSURL). And, no matter if I fetch the file or not, I do not run the function (to check for the file) again that day. This would SEEM easy... but I forsee issues. Say I had created a directory under the mainBundle: "/Library/runOnceEachDay/". Perhaps I could write to /Library/runOnceEachDay/20100601 knowing that file would only exist if I already ran the function. If it does not exist, run the function and after the function is successful write a zero length file with the date as the filename. Then check before running that function for "mainBundle/Library/runOnceEachDay/YYYYMMDD" whereas YYYYMMDD is today's date. If that file exists, do not run. I could run a housecleaning routine to clean that directory once/week or something. Any better ideas? Thanks!

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  • XCode - Multiple targets, Multiple *internationalized* names?

    - by Kris Jenkins
    I've got an internationalized iPhone project. In the various ${lang}.lproj/InfoPlist.strings files I've got a single key, CFBundleName = "My App Name". That's working fine for a single target, but I can't make it work for multiple targets. I'd like to have several translated InfoPlistMyApp.strings files for the main target, plus several InfoPlistMyApp*Lite*.strings files for the lite version. But I can't figure out how to set it up. The InfoPlist.strings name seems to be set in stone, so I can't replace it dynamically. Any ideas?

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  • Check if iOS app is live in app store

    - by MSK
    Is it possible somehow to code like below in iOS app ? if(app is live in app store) { //Do something } else { //Do other thing } I wanted to avoid cases where our QE/Dev team is using app for testing. Is there a way I can detect how app code is signed (Developer/Adhoc/Distribution) to check ? Even if it is possible, it will not eliminate cases when Apple is using our app for testing as part of review. We recorded many downloads of our content by Apple before our app goes live in App store.

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  • iPhone How to set a clearcolor for my custom view

    - by user355066
    Hi, I am creating a custom StyleLabel by extending the UIView, which provides a link for particular type of strings. I have successfully implemented this functionality. I am using this label in TableViewCell along with UILabel.i set UILabel & StyleLabel background color is set to clearColor. UILabel works fine, but StyleLabel shows background in blackColor. I am not sure what is the problem with the following code. Here is the drawRect method of CustomLabel class -(void) drawRect:(CGRect)rect { CGContextRef ctx = UIGraphicsGetCurrentContext(); CGContextClearRect(ctx, rect); [[UIColor clearColor] setFill]; CGContextAddRect(ctx, rect); CGContextDrawPath(ctx, kCGPathFill); [_text drawText:ctx]; } Thanks Sasikumar

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