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我有一個視圖具有響應拖動事件的UIButton。這一切都正常工作,問題是該按鈕只有70X70,拖動時用於手指的按鈕圖像大部分被手指遮住(該過程是用戶拖動圖像(UIButton)到視圖上的目標區域) 。有沒有辦法來抵消拖動手柄,所以它不是UIButton的中心點?理想情況下,我希望它是UIbutton圖像的右上角,因爲左下角是我最關心用戶看到的區域。在拖動UIButton時移動拖動手柄
編輯:這是我用來處理觸摸(拖拽)事件的代碼:
- (IBAction) imageTouch:(id) sender withEvent:(UIEvent *) event
{
UIButton *thisButton = (UIButton *)sender;
CGPoint centerPoint = [[[event allTouches] anyObject] locationInView:self.view];
UIControl *control = sender;
control.center = centerPoint;
UIColor *selColor = [WebImageOperations getColorFromImage:self.targetImageView.image atX:point.x andY:point.y];
NSInteger thisScore = [Scoring scoreFromUIColor:selColor withArrow:thisButton.tag];
switch (thisButton.tag) {
case 10:
arrow10Score = thisScore;
self.score10Label.text = [NSString stringWithFormat:@"%d", arrow10Score];
break;
case 12:
arrow12Score = thisScore;
self.score12Label.text = [NSString stringWithFormat:@"%d", arrow12Score];
break;
case 14:
arrow14Score = thisScore;
self.score14Label.text = [NSString stringWithFormat:@"%d", arrow14Score];
break;
default:
break;
}
NSInteger totalScore = arrow10Score + arrow12Score + arrow14Score;
self.totalScoreLabel.text = [NSString stringWithFormat:@"%d", totalScore];
}
給我們一些代碼。 – Melvin 2012-02-27 22:22:06
有你去。添加代碼 – 2012-02-28 10:29:44
可能是https://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIButton_Class/UIButton/UIButton.html#//apple_ref/occ/instp/UIButton/contentEdgeInsets或https:// developer .apple.com/library/ios /#DOCUMENTATION/UIKit/Reference/UIButton_Class/UIButton/UIButton.html#// apple_ref/occ/instp/UIButton/imageEdgeInsets – Melvin 2012-02-28 11:32:31