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我创建了一个很酷的应用程序，它以编程方式创建了 50 多个，UIButtons包括一个动作选择器。动作（播放声音）从 3 日UIView起停止工作。

在UIView里面UIScrollView并且使用分页。

我使用 iOS 5，但我认为这不是问题。此外，声音在UIScrollView. 此外，如果我更改按钮的数量（或多或少），声音总是很有吸引力，直到我到达第 3 页：/

这里的代码：

- (void)setButtons
{
    int screenWidth = 320;
    int screenHeight = 410;

    int rows = krows;
    int cols = kcols;
    int marginLeft = kmarginLeft;
    int height = kheight;
    int buttonWidth = kbuttonWidth;
    int buttonHeight = kbuttonHeight;
    int delta = kdelta; // gap between buttons
    int startPosY = kstartPosY; 
    int startPosX = kstartPosX;
    int posY = startPosY;
    int posX = startPosX;
    int contentWidth = screenWidth;
    int intStart = 0;

    NSMutableDictionary *dict = [Persistence getDictFromParam:@"Bud"];
    NSArray *keys = [dict allKeys];

    // sort keys 
    NSArray *sortedKeys = [keys sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];

    int len = keys.count; //50;
    NSLog(@"len: %d", len);

    CGSize scrollViewContentSize = CGSizeMake(screenWidth, screenHeight);
    [scrollView setContentSize:scrollViewContentSize];

    for( int i = intStart; i < len; i++ ) {
        UIButton* aButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [aButton addTarget:self action:@selector(sound1Action:) forControlEvents:UIControlEventTouchUpInside];

        NSString *key = [sortedKeys objectAtIndex:i];

        if (i > 0) {
            posY += delta + height;

            int mod = i % rows;
            if(mod == 0) {
                int mod2 = i % (rows*cols);
                if(mod2 == 0) {
                    posX += marginLeft;
                }
                posX += (marginLeft + buttonWidth);

                // extend pages
                if(posX > contentWidth) {
                    contentWidth += screenWidth;
                    CGSize scrollViewContentSize = CGSizeMake(contentWidth, screenHeight);
                    [scrollView setContentSize:scrollViewContentSize];
                }
                posY = startPosY;
            }
        }

        [aButton setFrame:CGRectMake(posX, posY, buttonWidth, buttonHeight)];
        NSString *title = [[NSString alloc] initWithFormat:@"%@", key];

        [aButton setBackgroundImage:[UIImage imageNamed:@"button_normal.png"] forState:UIControlStateNormal];
        [aButton setBackgroundImage:[UIImage imageNamed:@"button_pushed.png"] forState:UIControlStateHighlighted];
        [aButton setBackgroundImage:[UIImage imageNamed:@"button_pushed.png"] forState:UIControlStateSelected];
        [aButton setTitle:title forState:UIControlStateNormal];

        [aButton setTag:i];
        NSLog(@"%@: %d",title, aButton.tag);
        [contentView addSubview:aButton];
    }

    [scrollView setPagingEnabled:YES];
}


- (void)sound1Action:(id)sender {
    UIButton *button = (UIButton*)sender;
    int i = button.tag;
    BackgroundMusic *backgroundMusic = [BackgroundMusic sharedInstance];

    NSArray *sortedKeys = [self sortedDict];
    NSString *val = [[self getDict] objectForKey:[sortedKeys objectAtIndex:i]];
    NSLog(@"%@",val);

    NSURL *url = [[NSBundle mainBundle] URLForResource:val withExtension:nil];
    NSString *pathUrl = [url path];

    backgroundMusic.player=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:pathUrl] error:NULL]; 

    [backgroundMusic.player stop];
    [backgroundMusic.player play];

    [backgroundMusic player].volume = 0.5;
    backgroundMusic.player.numberOfLoops = 0; //-1; initite
}
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