UI--Gesture

1.轻拍
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)];
self.imv.userInteractionEnabled = YES;//因为图片会阻断事件,所以在其上面添加手势的时候一定要打开交互
[self.imv addGestureRecognizer:tap];
//    点击次数
tap.numberOfTapsRequired = 2;
//    触控点个数
tap.numberOfTouchesRequired = 2;
###################
- (void)tapAction{
NSLog(@"AAAAAA");
}
//imv 是你要作用的对象

2.长按
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
self.imv.userInteractionEnabled = YES;
[self addGestureRecognizer:longPress];
#############
- (void)longPress:(UILongPressGestureRecognizer *)longPress{
if (longPress.state == UIGestureRecognizerStateBegan) {
NSLog(@"hehahah");
}
}

3.旋转
UIRotationGestureRecognizer *rotate = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateAction:)];
self.imv.userInteractionEnabled = YES;
[self.imv addGestureRecognizer:rotate];
#######
- (void)rotateAction:(UIRotationGestureRecognizer *)rotateAction{
self.imv.transform = CGAffineTransformRotate(self.imv.transform, rotateAction.rotation);
[rotateAction setRotation:0];
}
注:transform 在这里是变换的意思

4 捏合
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];
self.imv.userInteractionEnabled = YES;
[self.imv addGestureRecognizer:pinch];
########
- (void)pinchAction:(UIPinchGestureRecognizer *)pinchAction{
self.imv.transform = CGAffineTransformScale(self.imv.transform, pinchAction.scale, pinchAction.scale);
//1是倍数的意思----这是清空之前的状态
pinchAction.scale = 1;
}

5.平移
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
self.imv.userInteractionEnabled = YES;
[self.imv addGestureRecognizer:pan];
#########
- (void)panAction:(UIPanGestureRecognizer *)sender{
NSLog(@"pan");

//取到点的信息
CGPoint point = [sender translationInView:self.imv];
self.imv.transform = CGAffineTransformTranslate(self.imv.transform, point.x, point.y);

//把每次保存的之前一次的移动距离清空
[sender setTranslation:(CGPointZero) inView:self.imv];
每次平移都会先回到原点,然后再动
self.imv.transform = CGAffineTransformMakeTranslation(point.x, point.y);
}
注:translation 是平移的意思
translateTransfrom 平移变换

6. 清扫
UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)];
self.imv.userInteractionEnabled = YES;
swipe.direction = UISwipeGestureRecognizerDirectionUp;
[self addGestureRecognizer:swipe];
##########

7. 边缘识别
UIScreenEdgePanGestureRecognizer *edge = [[UIScreenEdgePanGestureRecognizer alloc]initWithTarget:edge action:@selector(tapAction)];
self.imv.userInteractionEnabled = YES;
[self addGestureRecognizer:edge];