3

UIImageView アニメーションに問題があります。画像を含む 3 つの NSArray オブジェクトを作成し、UIImageView を取得してそれに新しいアニメーションを割り当てる 3 つのメソッドを作成しました。3 つのメソッドの 1 つを初めて呼び出すとうまく機能しますが、もう一度実行すると、シミュレータとデバイスがクラッシュします。何か案は？

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {

// set the anims
slowAnimation = [NSArray arrayWithObjects:
                    [UIImage imageNamed:@"image1.jpg"],
                    [UIImage imageNamed:@"image2.jpg"],
                                nil];
defaultAnimation = [NSArray arrayWithObjects:
                    [UIImage imageNamed:@"image3.jpg"],
                    [UIImage imageNamed:@"image4.jpg"],
                        nil];
fastAnimation = [NSArray arrayWithObjects:
                    [UIImage imageNamed:@"image5.jpg"],
                    [UIImage imageNamed:@"image6.jpg"],
                    nil];

// load the default speed - this works once, but when applied a second time it crashes the simulator and device
[self setDefaultAnim:myUIImageViewObject];

[super viewDidLoad];
}


// animation switcher
-(void)setSlowAnim:(UIImageView *)imageView
{
    [imageView stopAnimating];
    imageView.animationImages = slowAnimation;
    imageView.animationDuration = 0.4;
    [imageView startAnimating];
}
-(void)setDefaultAnim:(UIImageView *)imageView
{
    [imageView stopAnimating];
    imageView.animationImages = defaultAnimation;
    imageView.animationDuration = 0.4;
        [imageView startAnimating];
}
-(void)setFastAnim:(UIImageView *)imageView
{
    [imageView stopAnimating];
    imageView.animationImages = fastAnimation;
    imageView.animationDuration = 0.4;
   [imageView startAnimating];
}

ログのエラー:

[Session started at 2009-04-06 22:46:54 +0100.]
Loading program into debugger…
GNU gdb 6.3.50-20050815 (Apple version gdb-962) (Sat Jul 26 08:14:40 UTC 2008)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-apple-darwin".warning: Unable to read symbols for "/System/Library/Frameworks/UIKit.framework/UIKit" (file not found).
warning: Unable to read symbols from "UIKit" (not yet mapped into memory).
warning: Unable to read symbols for "/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics" (file not found).
warning: Unable to read symbols from "CoreGraphics" (not yet mapped into memory).
Program loaded.
sharedlibrary apply-load-rules all
Attaching to program: `/Users/hello/Library/Application Support/iPhone Simulator/User/Applications/6DB7C45D-1A26-4775-9AE3-C30F3EBC9F83/PlateSpinner.app/PlateSpinner', process 345.
kill
quit

The Debugger has exited with status 0.
4

3 に答える 3

8

retainで作成する 3 つの配列が必要だと思います。それらをviewDidLoad呼び出すallocことはないため、呼び出すまで所有権はありませんretain。

于 2009-04-07T19:15:05.727 に答える
3

保持を呼び出す代わりに、initWithObjects メッセージを使用します。

slowAnimation = [[NSArray alloc] initWithObjects:
                                  [UIImage imageNamed:@"image1.jpg"],
                                  [UIImage imageNamed:@"image2.jpg"],
                                  nil];
于 2009-04-08T00:20:46.007 に答える
0

ただし、Lounges が提案することを行う場合は、後で slowAnimation オブジェクトを解放する必要があることに注意してください。あなたがそれを割り当てたので、誰かがランタイムに別の方法で指示するまで、保持カウントは 1 になります。

于 2011-03-17T02:47:32.493 に答える