拖动手势在开发过程中用到频率较高，比如在app里弹出广告，我们可以将广告view向上或向下划出.话不多说，直接上代码
- (void)viewDidLoad {
[super viewDidLoad];
_imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 200, 80, 80)];
_imageView.backgroundColor = [UIColor redColor];
[self.view addSubview:_imageView];
_imageView.userInteractionEnabled = YES;
UIPanGestureRecognizer *panGes = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[_imageView addGestureRecognizer:panGes];
panGes.delegate = self;
}
- (void)move:(UIPanGestureRecognizer *)sender {
CGPoint pt = [sender translationInView:_imageView];
sender.view.center = CGPointMake(sender.view.center.x +pt.x , sender.view.center.y);
//每次移动完，将移动量置为0，否则下次移动会加上这次移动量
[sender setTranslation:CGPointMake(0, 0) inView:self.view];
if (sender.state == UIGestureRecognizerStateEnded) {
NSLog(@"pan.view == %f", sender.view.center.x);
}
}
- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer {
CGPoint translation = [gestureRecognizer translationInView:gestureRecognizer.view];
NSLog(@"translation == %f", translation.x);
// if (translation.x >= 0) {
// return NO;
// }
return YES;
}
具体操作还得具体分析，这里简单记录下做法。
