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cameraoverlay にオーバーレイ画像があります。ユーザーがオーバーレイ画像をダブルタッチしたときにズームイン/ズームアウトする必要があります。

オーバーレイ画像のコード:

UIImageView *overlayImageView = [[UIImageView alloc] 
initWithImage:[UIImage imageNamed:@"overlay.png"]];
[overlayImageView setFrame:CGRectMake(30, 100, 260, 200)];
[[self view] addSubview:overlayImageView];
[overlayImageView release];
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- (void)viewDidLoad {
    [super viewDidLoad];

    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)];
    tapGesture.numberOfTapsRequired = 2;
    [overlayImageView addGestureRecognizer:tapGesture]; // add tapGesture to your ImageView
    [tapGesture release];

  self.isTouch == YES; // it is BOOL type.
}

 - (void)handleTapGesture:(UITapGestureRecognizer *)sender 
{
        if(self.isTouch)
        {
              // put relavent size of Zoom ImageView
            self.isTouch == NO;
        }
        else
        {
              // put code for normal ImageView
              self.isTouch == YES;
        }
}
于 2013-03-21T11:38:24.313 に答える