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  • ivar is inside two blocks

    - by Desperate Developer
    I have an ivar like this declared on interface: BOOL controllerOK; I have to use this ivar inside a block that resides itself in a block. Something like myBlockl = ^(){ [self presentViewController:controller animated:YES completion:^(){ if (controllerOK) [self doStuff]; }]; }; If I try to do that, I see an error capturing self strongly in this block is likely to lead to a retain cycle for the if (controllerOK) line. This does not appear to be one of those blocks problems that you create another variable using __unsafe_unretained before the block starts. First because this instruction cannot be used with a BOOL and second because the ivar controllerOK has to be tested on runtime inside the block. Another problem is that the block itself is declared on the interface, so it will be used outside the context where it is being created. How do I solve that?

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  • A good UI design for rating in .Net

    - by Ben
    Hi, im trying to add a "rating" system to an existing form (i.e 1 star, 2 Star or poor, average,good,excellent etc). Does anyone know of a way to achieve this that is aesthetically pleasing with good UX either in .Net or a free 3rd party control? Thanks

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  • Design pattern to encapsulate common funtionality among UI controls

    - by Dan
    I'm brainstorming some ideas around a pattern to use for the following scenario. I have some 3rd party controls that I want to add common functionality to. Functionality is added by handling several of the the events and doing certain things when the events fire along with adding some private variables to hold some state info between events. I want to reuse the code and functionality so this is what I'd typically do. Create a class for this functionality and pass in the instance of the control that I want to add the functionality to in the constructor. Then I can add event handlers to the control in the instance of the class. Can anyone think of alternative patterns to use in order to create this kind of reusable functionality.

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  • Vfr/reader when to read a page

    - by juliet
    I downloaded vfr reader soure code on github. I am reading it, I found when need show a page of PDF, it will call showdocument method in showdocument method, it will new a readercontentview in readercontentview it will new a readercontentpage which has a citiedlayer delegate method called drawlayer:incontext I don't understand when and how to call this method, because there is no update for the readercontentview.

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  • PDF search on the iPhone

    - by pt2ph8
    After two days trying to read annotations from a PDF using Quartz, I've managed to do it and posted my code. Now I'd like to do the same for another frequently asked question: searching PDF documents with Quartz. Same situation as before, this question has been asked many times with almost no practical answers. So I need some pointers first, as I still haven't implemented this myself. What I tried: I tried using CGPDFScannerScan handling the TJ and Tj operators - returns the right text on some PDF, whereas on other documents it returns mostly random letters. Maybe it's related to text encoding? Someone pointed out that text blocks (marked by BT/ET operators) should be handled instead, but I still haven't managed to do so. Anyone managed to extract text from any PDF? After that, searching should be easy by storing all the text in a NSMutableString and using rangeOfString (if there's a better way please let me know). But then how to highlight the result? I know there are a few operators to find the glyph sizes, so I could calculate the resulting rect based on those values, but I've been reading the spec for hours... it's a bloated mess and I'm going insane. Anyone with a practical explanation? Thanks.

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  • UIButton addTarget method can not use in IOS 4.2

    - by Risma
    hi i have a UIButton made programmatically and i want to add the target and the action for that button. i have use method addTarget: action: forControlEvents: in IOS 4.1 this method is detected, but in 4.2 it didn't, here is my code float version = [[[UIDevice currentDevice] systemVersion] floatValue]; if(version <= 4.1){ moreButton = [[UIButton buttonWithType:UIButtonTypeCustom] initWithFrame:CGRectMake(6.3+5*widthSegment, 0.0, widthSegment, heightSegment)]; [moreButton addTarget:self action:@selector(getPopOverMore:) forControlEvents:UIControlEventTouchUpInside]; } else{ //version 4.2 NSLog(@"versi 4.2"); moreButton = [UIButton buttonWithType:UIButtonTypeCustom]; moreButton.frame = CGRectMake(6.3+7*widthSegment, 0.0, widthSegment, heightSegment); [moreButton addTarget:self action:@selector(getPopOverMore:) forControlEvents:UIControlEventTouchUpInside]; } and this is the action method : - (IBAction)getPopOverMore:(id)sender{ if(moreFileController == nil) { moreFileController = [[MoreFilePopController alloc] initWithStyle:UITableViewStylePlain]; moreFileController.delegate = self; moreFilePopOverController = [[UIPopoverController alloc] initWithContentViewController:moreFileController]; } CGRect frameMore = CGRectMake(6.3+5*widthSegment, 0.0, widthSegment, heightSegment); [moreFilePopOverController presentPopoverFromRect:frameMore inView:navBar permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES]; } any body know, what's wrong here??

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  • Phonegap and JqueryMobile freeze UI events and functions

    - by techytee
    I am developing a Phonegap app with JQuery mobile with their latest stable versinos (Phonegap 3 and JQM 1.3.2) for Android platform. My app downloads feeds from Google Feeds API and saves in a SQLite database. But whenever it starts fetching and saving data from the web (the no of feeds that download at a time can be many), the other functionality such as button events halt and freeze. To be precise the a button that opens and closes a panel does not either open or close the panel until the data fetching stops. How am I supposed to solve this issue? The performance has dropped drastically due to this issue in my app.

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  • UIImage Object surprisingly returning null but not NSData

    - by riyaz
    i have created a sqlite db. and i have insert a few datas in my db.. UIImage * imagee=[UIImage imageNamed:@"image.png"]; NSData *mydata=[NSData dataWithData:UIImagePNGRepresentation(imagee)]; const char *dbpath = [databasePath UTF8String]; NSString *insertSQL=[NSString stringWithFormat:@"insert into CONTACTS values(\"%@\",\"%@\")",@"Mathan",mydata]; NSLog(@"mydata %@",mydata); sqlite3_stmt *addStatement; const char *insert_stmt=[insertSQL UTF8String]; if (sqlite3_open(dbpath,&contactDB)==SQLITE_OK) { sqlite3_prepare_v2(contactDB,insert_stmt,-1,&addStatement,NULL); if (sqlite3_step(addStatement)==SQLITE_DONE) { sqlite3_bind_blob(addStatement,1, [mydata bytes], [mydata length], SQLITE_TRANSIENT); NSLog(@"Data saved"); } else{ NSLog(@"Some Error occured"); } sqlite3_close(contactDB); } else{ NSLog(@"Failure"); } have written some codes to retrive the data sqlite3_stmt *statement; if (sqlite3_open([databasePath UTF8String], &contactDB) == SQLITE_OK) { NSString *sql = [NSString stringWithFormat:@"SELECT * FROM contacts"]; if (sqlite3_prepare_v2( contactDB, [sql UTF8String], -1, &statement, nil) == SQLITE_OK) { while (sqlite3_step(statement) == SQLITE_ROW) { char *field1 = (char *) sqlite3_column_text(statement, 0); NSString *field1Str = [[NSString alloc] initWithUTF8String: field1]; NSLog(@"UserName %@",field1Str); NSData *data = [[NSData alloc] initWithBytes:sqlite3_column_blob(statement, 1) length:sqlite3_column_bytes(statement, 1)]; UIImage *newImage = [[UIImage alloc]initWithData:data]; NSLog(@"Image OBJ %@",newImage); NSLog(@"Image Data %@",data); } sqlite3_close(contactDB); } } sqlite3_finalize(statement); the problem is in log, inserted NSData object and retrieved NSData Objects are different (printing in log gives different stream) moreover Image OBJ is printed null in log.. Have seen similar questions in stackoverflow. But nothing seems to help. Please give some suggestions to overcome this issue.

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  • Manually Dispatching a DocumentEvent for testing UI element validation code

    - by Bassam
    Hi. I'm testing a Swing GUI application using the UISpec4J testing framework. I'm testing validation code on a JTextField, but the framework does not support focus-change events, as it runs the application in a headless fashion. The text field has a DocumentEvent attached to it that activates the validation code. I'm trying to figure out how to dispatch the document event manually to activate the validation code. Trying to dispatch focus or mouse events manually haven't been working for me. Thanks for any help!

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  • Getting the position of the element in a list when it's drag/dropped (ui.sortable)

    - by Wurlitzer
    Hi, I have a sortable list like this one: http://jqueryui.com/demos/sortable Is it possible to get the start and end position of the element in the list, when it has been moved? I'm talking about their position number, in the list. For example, if I move element 2 to position 5 in the list, I'd like to assign those two numbers to variables. I'm new to jQuery - any help would be much appreciated.

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  • Detect when home button is pressed iOS

    - by nick
    I have several iOS apps that all use the same port to listen for a network beacon. On the main view I use viewWillDisappear to close the port when another view is opened, which was working great. Then I noticed if I pressed the home button from the main view controller without opening another view to close the port, then the port stays open and non of my other apps can listen on that port any more. I then tried using viewWillUnload, but that doesn't seem to get called when I press the home button. -(void)viewWillUnload { //[super viewWillUnload]; NSLog(@"View will unload"); [udpSocket close]; udpSocket = nil; } View will unload is never displayed in the console, which leads me to believe that the method is never getting called. Is there a way to detect when the home button is pressed so I can close my port?

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  • iphone view controller class - how to

    - by Brodie4598
    Hello - I need to create my own UIView class and it is not something I have had to do. I created the class, then laid out the small view in IB (it's just a few labels that i will later need to add data to ). but now im stuck on how to actually put an instance of it in my main view. Can someone point me in the direction of a good tutorial? The closest thing I have done to this is creating a custom tableViewCell. DataTagViewController *dataTag = [[DataTagViewController alloc]init]; [theMap addSubView: dataTag];

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  • iphone/ipad with 2 side by side tables

    - by jesse001
    I want to create a view with 2 tables side by side, where selecting the row on 1 table effects the content of the other and vice versa (not parent child). My problem is how to send the request. I started with a utility app using core data, and added 2 table view controllers. I added these to the main view nib and moved the tables to the view. One table controls a list from Core Data, then on selecting a row I want it to move to the other table which is based on a mutable array. On didselectrow I want to tell the other table to update, however I can only find samples that are parent/child so involves initializing. Does anyone know of a way to do this for an active view? Thanks heaps for your help.

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  • How to check if a BOOL is null?

    - by Sheehan Alam
    Is there a way I can check to see if a value is NULL/Nil before assigning it to a BOOL? For example, I have a value in a NSDictionary that can be either TRUE/FALSE/NULL mySTUser.current_user_following = [[results objectForKey:@"current_user_following"]boolValue]; When the value is NULL I get the following error *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSNull boolValue]: unrecognized selector sent to instance I would like to be able to handle the NULL case.

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  • Click event of a button which is subview of an image view in xcode

    - by Christina
    in my app i have an image view and above that i added an button.And also in button click event i am calling a method.But i am unable to click on the button .whenever i try to click the button then the row of the table vie win which my image view is present is selected .Is there any method from which i can get the click event of the button which is placed on the image view.I do not want to use UIbuttons for setting the images in place of image view .Also if i am adding button as a subview of the table view then the click event is working but when i change the subview to image view then i get unsatisfactory result.Please help. Thanks, Christy

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  • iOS Development: Does the GameKit SDK allow you to retrieve achievements by players other than the local player?

    - by BeachRunnerJoe
    Hello. I'm building a game that uses Game Center to connect players and manage leaderboards and achievements. I see that you can retrieve leaderboard details for any player, but can you do the same with achievements? When the user finishes a match with an opponent, I'd like to give the user the option to view the opponents profile, including leaderboard scores and completed achievements. I haven't found anything in the docs that shows me how to retrieve achievement details for players other than the local player, am I missing it or is this currently not supported? Thanks so much for your help!

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  • save sqlite3 file of my App

    - by user1553381
    I'm new with dealing with the .sqlite3 in iphone, I created a sqlite3 file in /Users/myLab/Library/Application Support/iPhone Simulator/5.1/Applications/308C4355-D8EE-4524-A7F9-638DEB68B298/Documents/file.sqlite3 and I inserted the tables into it using Terminal.app and everything works ok with my app. but when I moved this application to another device, opened by xcode and trying to run it, I discovered that my tables are not found in this .sqlite3 file in another device. how can I save my tables in .sqlite3 file??

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  • iPhone rotation on demand

    - by yosh
    Is there a way to manually check current position of device AND ask device to automatically rotate it without waiting for user to actually rotate the device? Currently I control the rotation with several IFs in -shouldAutorotateToInterfaceOrientation but in few situations I have to stop the view from rotating and enable it again and I don't want user to rotate the device twice to have the desired orientation.

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  • Re-opening closed dialog puts it in the start position after moving it

    - by semmelbroesel
    I'm using multiple instances of the JQuery-UI dialog along with draggable and resizable. Whenever I drag or resize one of the dialog boxes, the position and dimensions of the current box are saved to a database and then loaded the next time the page opens. This is working well. However, when I close a dialog box and re-open it using a button, jQuery sets the position of the box back to its original location in the center of the screen. Furthermore, I use a show effect to slide the box off to the left on closing and in from the left on re-opening. I found two ways to update its position when the slide in animation is done, however, it still slides into the center of the screen, and I have yet to find a way to get it to slide in towards the location it is supposed to have. Here are the parts of the code that play a part in this: $('.box').dialog({ closeOnEscape: false, hide: { effect: "drop", direction: 'left' }, beforeClose: function (evt, ui){ var $this = $(this); SavePos($this); // saves the dimensions to db }, dragStop: function() { var $this = $(this); SavePos($this); }, resizeStop: function() { var $this = $(this); SavePos($this); }, open: function() { var $this = $(this); $this.dialog('option', { show: { effect: "drop", direction: 'left'} } ); if (init) // meaning only load this code when the page has finished initializing { // tried it both ways - set the position before and after the effect - no success UpdatePos($this.attr('id')); // I tried this section with promise() and effect / complete - I found no difference $this.parent().promise().done(function() { UpdatePos($this.attr('id')); }); } } }); function UpdatePos(key) { // boxpos is an object holding the position for each box by the box's id var $this = $('#' + key); //console.log('updating pos for box ' + boxid); if ($this && $this.hasClass('ui-dialog-content')) { //console.log($this.dialog('widget').css('left')); $this.dialog('option', { width: boxpos[key].width, height: boxpos[key].height }); $this.dialog('widget').css({ left: boxpos[key].left + 'px', top: boxpos[key].top + 'px' }); //console.log('finished updating pos'); //console.log($this.dialog('widget').css('left')); } } The button that re-opens the box has this code on it to make that happen: var $box = $('#boxid'); if ($box) { if ($box.dialog('isOpen')) { $box.dialog('moveToTop'); } else { $box.dialog("open") } } I don't know what jQuery-UI does to the box as it hides it (other than display:none) or to make it slide in, so maybe there's something I'm missing here that might help... Basically, I need JQuery to remember the box' position and put the box back into that location when it is re-opened. It took me days to make it this far, but this is one obstacle I have yet to overcome. Maybe there's a different way I can re-open the box? Thanks! EDIT: Forgot - this issue ONLY happens when I use my UpdatePos function to set the location of a box (i.e. on page load). When I drag a box with my mouse, close it, and re-open it, everything works. So I'm guessing there's one more storage location for the box' position that I'm missing here... EDIT2: After more messing with it, my code for debugging now looks like this: open: function() { var $this = $(this); console.log('box open'); console.log($this.dialog('widget').position()); // { top=0, left=-78.5} console.log($this.dialog('widget').css('left')); $this.dialog('option', { show: { effect: "drop", direction: 'left'} } ); if (init) { UpdatePos($this.attr('id')); $this.parent().promise().done(function() { console.log($this.dialog('widget').position()); // { top=313, left=641.5} console.log($this.dialog('widget').css('left')); UpdatePos($this.attr('id')); console.log($this.dialog('widget').position()); // { top=121, left=107} console.log($this.dialog('widget').css('left')); }); } The results I'm getting are: box open Object { top=0, left=-78.5} -78.5px Object { top=313, left=641.5} 641.5px Object { top=121, left=107} 107px So looks to me as if the widget is being moved off screen (left=-78.5) and then moved for the animation, and then my code moves it into the location that it should be in (121/107). The position() results for $box.position() or $box.dialog().position() do not change during this debugging section. Maybe this will help someone here - I'm still out of ideas here... ... and I just discovered that when I drag the item around myself, then close and re-open it, it is very unpredictable. Sometimes, it will end up in the correct location horizontally, but not vertically. Sometimes, it will end up back in the center of the screen...

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  • JQueryMobile 1.1.1 List items not anchoring to the left

    - by user1664935
    I'm trying to create a simple thumbnail list, the code is pretty much copied off jqm docs pages. However, when I use the code below the button element of the list isn't anchored to the left of the list item and instead appears centered...Can anyone help me? It's driving me crazy! I haven't got any styles in other than what is in the jquerymobile default page template <div id="listDiv" class="ui-content" data-role="main"> <div id="listInformation" data-role="content-primary"> <ul id="swipeMeChildrenList" data-role="listview" class="ui-listview"> <li data-corners="false" data-shadow="false" data-iconshadow="true" data-wrapperels="div" data-icon="arrow-r" data-iconpos="right" data-theme="c" class="ui-btn ui-btn-icon-right ui-li-has-arrow ui-li ui-btn-up-c"> <div class="ui-btn-inner ui-li"> <div class="ui-btn-text"> <a href="index.html" class="ui-link-inherit"> <img src="images/album-p.jpg" class="ui-li-thumb"> <p>Ha</p> </a> </div> <span class="ui-icon ui-icon-arrow-r ui-icon-shadow">&nbsp;</span> </div> </li> </ul> </div> </div>

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  • Cell contents changing after I select rows present outside its height?

    - by wolverine
    I have set the size of the tableView that I show as the popoverController as 4*rowheight. And I am using 12cells in the tableView. Each cell contains an image and a label. I can see all the cells by scrolling. Upto 5th cell its ok. After th2 5th cell, the label and the image that I am using in the first four cells are being repeated for the remaining cells. And If I select the cell, the result is accurately shown. But when I again take the tableView, the image and labels are not accurate even for the first 5 cells. All are changed but the selection is giving the correct result. Did anyone got the idea what the problem is??

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  • Does tableViewController behave incorrectly when hosted by a popoverController?

    - by dugla
    I have made countless test examples of a tableViewController hosted by a popoverController and I have come to the following conclusion: It does not appear possible to pre-select a tableView cell. It is possible to do pre-selection when a tableViewController is hosted by a splitviewController. I am using the exact same tableViewController code. Here is the relevant tableViewController view lifecycle method that is misbehaving: static BOOL firstTime = YES; - (void)viewDidAppear:(BOOL)animated { NSLog(@"Root ViewController - view Did Appear"); [super viewDidAppear:animated]; if (firstTime == YES) { firstTime = NO; NSIndexPath *preselectedCell = [NSIndexPath indexPathForRow:5 inSection:0]; [self.tableView selectRowAtIndexPath:preselectedCell animated:NO scrollPosition:UITableViewScrollPositionTop]; detailViewController.detailItem = [NSString stringWithFormat:@"Row %d", preselectedCell.row]; } // if (firstTime == YES) } The above code correctly preselects a tableView cell the first time the tableView is unfurled in the splitViewController case (device in portrait mode). Can someone please, please, explain what I am doing wrong. I am completely stumped. Thanks, Doug

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