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一個UIScrollView我有這樣的代碼：IOS：放大隻能與多點觸控
[scrollView setMinimumZoomScale:1.00];
[scrollView setMaximumZoomScale:2.00];
scrollView.delegate=self;
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
NSSet *allTouches = [event allTouches];
if ([allTouches count] == 2) {
NSLog(@"multitouch");
zoomMultiTouch = TRUE;
}
else if ([allTouches count] == 1){
NSLog(@"single touch");
zoomMultiTouch = FALSE;
}
else return;
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
if (zoomMultiTouch){
scrollView.userInteractionEnabled = YES;
scrollView.scrollEnabled = YES;
NSLog(@"zoomMultitouch moved");
}
else {
scrollView.userInteractionEnabled = NO;
scrollView.scrollEnabled = NO;
NSLog(@"NOzoom moved");
}
//some code for coloring an image
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
scrollView.userInteractionEnabled = NO;
scrollView.scrollEnabled = NO;
zoomMultiTouch = FALSE;
}
，你可以看到，我想放大滾動視圖裏面的圖像;當我用手指觸摸scrollView時，彩色圖像，而是當我用兩根手指滾動視圖觸摸時，我想對其進行縮放，如果用手指觸摸，必須禁用zomm。用我的代碼 它不會發生;它承認雙重觸摸但不主動縮放，爲什麼？