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  • Can I just release the top object (iPhone)?

    - by yar
    If I release the object that's holding a reference to the variable that I need to release, is that sufficient? Or must I release at every level of the containment hierarchy? I fear that my logic comes from working with a garbage collector for too long. For instance, I assigned to this property of a UIPickerView instance by hand instead of using IB @property(nonatomic, assign) id<UIPickerViewDelegate> delegate Since it's an assign property, I can't just release the reference after I assign it. When I finally release my UIPickerView instance, do I need to do this: [singlePicker.delegate release]; [singlePicker release]; or is the second line sufficient? Also: Are these assign properties the norm, or is that mostly for Interface Builder? I thought that retain properties were the normal thing to expect.

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  • Where does the 'method' implementation go? (I'm a newbie)

    - by Spokane-Dude
    I have this code: #import "SQLiteDB.h" @implementation SQLiteDB @synthesize db, dbPath, databaseKey; @end //-------------- check for database or create it ----------------| - (void)checkForDatabase { NSFileManager *filemanager = [NSFileManager defaultManager]; NSString *databasePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingString:@"/ppcipher.s3db"]; if(![filemanager fileExistsAtPath:databasePath]) { //Database doesn't exist yet, so we create it... NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/ppcipher.s3db"]; sqlite3 *db; if(sqlite3_open(databasePath, db) == SQLITE_OK) { } } } It's complaining that "method definition not in @implementation context". So where does it go? (I tried in the .h file, but still get the error)

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  • UITableViewCell get nil

    - by MTA
    I create a UITableView with custom UITableViewCell,this is how i create the cell in cellForRowAtIndexPath: static NSString *CellIdentifier = @"SongsCell"; SongsCell *cell = (SongsCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil){ UIViewController *vc = [[[UIViewController alloc] initWithNibName:@"SongsCell" bundle:nil] autorelease]; cell = (SongsCell *) vc.view; } now i want to get all cells in the table info (parameter from cell) when a button pressed: for (int i = 0; i < [songTable numberOfRowsInSection:0]; i++) { NSIndexPath *indexPath = [NSIndexPath indexPathForRow:i inSection:0]; UITableViewCell *cell = [songTable cellForRowAtIndexPath:indexPath]; } Now i have a problem that this loop give me for cell a nil for all the cell that currently not seen in the table.

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  • Highlight table view cells when user drags across rows

    - by chronos
    I have a grouped table view that does not need to scroll. I'd like each cell to highlight as the user moves their finger down the screen and call didSelectRowAtIndexPath on release. This behaviour can be seen done by apple in 'settings mail add account'? I can't seem to replicate it myself, all I can get is the default, where the cell deselects as soon as the user moves their finger.

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  • How can I set a connection time out manually?

    - by Daniel
    I use connect(socketfd, (struct sockaddr*)&remoteAddr, sizeof(remoteAddr)) to connect my iPhone to a computer (over WIFI) and it works fine so far. However if the computer is out of reach, my iPhone tries to establish a connection for more than a min. Is there a posibility to set the time manually out to a new value, e.g. 15 sec?

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  • Change the width of the cell content

    - by user313439
    I want to change the width of the cell content. (see the pic) My code: CGSize contentViewSize = cell.contentView.bounds.size; contentViewSize.width = 20.0f; But there is no effect, what's wrong? Any suggestion will be appreciated, thanks.

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  • How can I pass information between 2 different View Controllers?

    - by sagiftw
    Hi, This is a simple question: I have 2 different view controllers, and each one has its own data stored in its .m file. I want to take a value, for instance, an integer value (int i=3;) that is declared in ViewController1 and pass it to ViewController2, so I will be able to use that value in the second view controller. Can anyone please tell me how to do it? Thanks in advance, Sagiftw

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  • iPhone development

    - by sid
    Hi All, I am new to iPhone development. I want to make a simple iPhone application which when launched computes the distance travelled by the user,calories burnt,postion of the user,movement.Can anybody provide me the details or approach to follow to develop this application.

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  • Ojective C Class or struct?

    - by Scott Pendleton
    I have a class Song with properties Title, Key, Artist, etc. There are no methods. I loop through a database of song information and create a Song object for each, populating the properties, and then store the Song objects in an NSArray. Then I thought, why not just have a struct Song with all those same properties instead of a class Song. Doing so would eliminate the class files, the #import Song line in the using class's .m file, and the need to alloc, init, release. On the other hand, I'd have to put the struct definition in every class that might need it. (Unless there's some globally accessible location -- is there?) Also, can a struct be stored in an NSArray?

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  • Application frame leaves blank line at the top

    - by iFloh
    Any clues why my programmatically defined UIScrollView (using the application frame) always leaves an empty space at the top (below the navigationBar) of 20 pixels. How can I close that? UIScrollView *vScrollView = [[UIScrollView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; vScrollView.backgroundColor = [UIColor redColor]; How do I need to call the application frame size to avoid that gap?

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  • bounding a sprite in cocos2d

    - by Srinivas
    am making a canon to fire objects. back of the canon the plunger is attached. plunger acts for set speed and angle. canon rotates 0-90 degree and plunger moves front and back for adjust speed. when am rotates the canon by touches moved its working fine. when plunger is pull back by touches moved and it rotates means the plunger is bounds outside of the canon. how to control this:- my code for plunger and canon rotation on touches moved. ( para3 is the canon , para6 is my plunger):- CGPoint touchLocation = [self convertTouchToNodeSpace:touch]; CGPoint oldTouchLocation = [touch previousLocationInView:touch.view]; oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation]; oldTouchLocation = [self convertToNodeSpace:oldTouchLocation]; if (CGRectContainsPoint(CGRectMake(para6.position.x-para6.contentSize.width/2, para6.position.y-para6.contentSize.height/2, para6.contentSize.width, para6.contentSize.height), touchLocation) && (touchLocation.y-oldTouchLocation.y == 0)) { CGPoint diff = ccpSub(touchLocation, oldTouchLocation); CGPoint currentpos = [para6 position]; NSLog(@"%d",currentpos); CGPoint destination = ccpAdd(currentpos, diff); if (destination.x < 90 && destination.x >70) { [para6 setPosition:destination]; speed = (70 + (90-destination.x))*3.5 ; } } if(CGRectIntersectsRect((CGRectMake(para6.position.x-para6.contentSize.width/8, (para6.position.y+30)-para6.contentSize.height/10, para6.contentSize.width, para6.contentSize.height/10)),(CGRectMake(para3.position.x-para3.contentSize.width/2, para3.position.y-para3.contentSize.height/2, para3.contentSize.width, para3.contentSize.height)))) { [para3 runAction:[CCSequence actions: [CCRotateTo actionWithDuration:rotateDuration angle:rotateDiff], nil]]; CGFloat plungrot = (rotateDiff); CCRotateTo *rot = [CCRotateTo actionWithDuration:rotateDuration angle:plungrot]; [para6 runAction:rot]; } }

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  • ViewDidLoad not being called with my custom UIViewController

    - by user1060500
    I have created a custom UIViewController class that creates a ScrollView at runtime that it loads into the view. See code here in the constructor of my custom UIViewController. initControl(id, canEdit); _controllers = new NSMutableArray(0); //required to keep view controllers around _scrollView = new UIScrollView(); _scrollView.BackgroundColor = UIColor.Green; this.View = _scrollView; ViewDidAppear and ViewWillAppear are called normally. ViewDidLoad is not called which I am not sure why as the view is showing up on the screen just fine. Any ideas?

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  • How to add Image On 'more' Button of UITabBarController in iOS 6?

    - by iPatel
    I know That How to add UITabBarController and how it used, I already done it. My Problem is only that I am no able to add image on 'more' button of UITabBarController. I know There are may Question That Similar to my Question but no one can help me. After googling I found that we can't add images on 'More' button in UITabBarController Because more button is autometically displayed by UITabBarController when UITabBarItem more Then 5. I also find that how to change SELECTION COLOR AND TITLE OF 'more' Button But I can not find abut 'more' button Image. So may be i need to Custom UITabBarController so, I also searching for any Custom UITabBarController but also I can not find it. Please help me on this Issue.

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  • Incorrect rotation of a view controller in iOS 6

    - by XenElement
    In my app I've been using the now deprecated shouldAutoRotateToFace method. Now when using the iOS 6 simulator, all of my subviews are rotated to portrait orientation while the device is in landscape. Does anyone have any idea what could cause this? I've already tried replacing should autorotate in my main view controller with the supportedOrientations method (or whatever it is that you're now supposed to use instead).

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  • Starting a SKProductsRequest gives -[_NSCFArray length] invalid selector error a moment later. LoadMicroPaymentsProductsOperation error.

    - by quantumpotato
    I'm fetching a list of identifiers from my server, then passing them off in a products request to Apple. Here's my code, and below is the error I'm getting. The iPhone 4 is not crashing when this happens. -(void)didReceiveData:(NSArray *)data { NSLog(@"Received Identifiers: %@",data); NSSet *productIdentifiers = [NSSet setWithArray:data]; SKProductsRequest *productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:productIdentifiers]; productsRequest.delegate = self; [productsRequest start]; NSLog(@"productsRequest should have started by now"); } Wed Dec 29 09:42:14 iPhone XXXX-iphone[6363] <Warning>: Received Identifiers: ( ( 1, 10, "com.XXXX.XXXX.10" ) ) Wed Dec 29 09:42:14 iPhone XXXX-iphone[6363] <Warning>: productsRequest should have started by now Wed Dec 29 09:42:18 iPhone itunesstored[6367] : -[__NSCFArray length]: unrecognized selector sent to instance 0x119070 Wed Dec 29 09:42:18 iPhone itunesstored[6367] : caught -[__NSCFArray length]: unrecognized selector sent to instance 0x119070 exception with stack trace: (0x33ac0975 0x3347b49d 0x33ac2133 0x33a69aa9 0x33a69860 0x2717b 0x27515 0x31469651 0x314693ed 0x31469e39 0x3362795f 0x336276c3 0x3363c4eb 0x33c32680 0x33c32ba0 0x33bd7251 0x33bcf978)

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  • UIView animation cancels previous animation?

    - by user281300
    Hi I have an NSTIMER that counts the time, and on t = 10, it fires an animation but during that time it might happen that another animation is running. This causes the previously running animation to cut off. Any idea? i thought UIVIEW animations were ran in diff threads. I cannot use a willstop selector here since t = 10 might happen while another animation is running and might not have ended yet.

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  • Trouble with ID in NSString

    - by useboot
    I am trying to create something interesting in my application. So, I created an UILabel and I want to output new value. So, my code. NSString *test = @"13"; self.UserAge.text = @"Your age is %@", test; But it doesn't work. In Console-Command Mode I can do it with NSLog(); My result is "Your age is %@". But I need to output "Your age is 13". What do I should do with name? Sorry, if my question is easy for you. I am beginner. :) Thank you everyone who will answer on my question.

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  • Difference between [object variable] and object.variable in Obj-C?

    - by John Smith
    I was working on a program today and hit this strange bug. I had a UIButton with an action assigned. The action was something like: -(void) someaction:(id) e { if ([e tag]==SOMETAG) { //dostuff } } What confuses me is that when I first wrote it, the if line was if (e.tag==SOMETAG) XCode refused to compile it, saying error: request for member 'tag' in 'e', which is of non-class type 'objc_object*' but I thought the two were equivalent. So under what circumstances are they not the same?

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