拖动实现图片移动效果
拖动实现图片移动效果
先写一个手势，注意图片的 userInteractionEnabled设置为yes
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
UIImage *image = [UIImage imageNamed:@"r.jpg"];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 40, 80, 80)];
imageView.image = image;
imageView.userInteractionEnabled = YES;
[self addSubview:imageView];
[imageView addGestureRecognizer:pan];
}
拖动的方法，最后一句是关键代码
- (void)pan:(UIPanGestureRecognizer *)gesture
{
CGPoint point = [gesture translationInView:self];
gesture.view.center = CGPointMake(gesture.view.center.x + point.x, gesture.view.center.y + point.y);
[gesture setTranslation:CGPointMake(0, 0) inView:self];
}
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原文：http://blog.csdn.net/lu_ca/article/details/46711681