IOS系统提供了那些手势？请选择一个自己写代码实现 UITapGestureRecognizer敲击手势（单击和双击） UIPanGestureRecognizer（拖动手势） UIPinchGestureRecognizer（缩放手势） UISwipeGestureRecognizer（擦碰手势） UIRotationGestureRecognizer（旋转手势） UILongPressGestureRecognizer（长按手势）
UIView
*gestureView = [[UIView
alloc] initWithFrame:CGRectMake(50, 50, 300, 300)];
gestureView.backgroundColor = [UIColor
blackColor];
[self.view
addSubview:gestureView];
/*---------------点击手势-------------*/
UITapGestureRecognizer *tap1
= [[UITapGestureRecognizer
alloc
]
initWithTarget
:
self
action
:
@selector
(tap1Action:)];
//注意：一个点击手势，只能识别一种手势，单击和双击是不同的两个手势
//设置点击的数量
tap1.numberOfTapsRequired =
1
;
//设置点击的个数
tap1.numberOfTouchesRequired
=
1
;
//往gestureView上添加一个手势
[gestureView addGestureRecognizer:tap1];
UITapGestureRecognizer *tap2
= [[UITapGestureRecognizer
alloc
]
initWithTarget
:
self
action
:
@selector
(tap2Action:)];
tap2.numberOfTapsRequired =
2
;
[gestureView addGestureRecognizer:tap2];
//如果参数中的手势出发了，则自身失效
[tap1
requireGestureRecognizerToFail:tap2];
/*---------------轻扫手势-------------*/
UISwipeGestureRecognizer
*swipeGesture = [[UISwipeGestureRecognizer
alloc
]
initWithTarget
:
self
action
:
@selector
(swipe:)];
// 设置方向－－－向上轻扫
swipeGesture.
direction
=
UISwipeGestureRecognizerDirectionUp;
[gestureView addGestureRecognizer:swipeGesture];
/*---------------平移手势-------------*/
// 平移手势（滑动）
UIPanGestureRecognizer
*panGesture = [[UIPanGestureRecognizer
alloc
]
initWithTarget
:
self
action
:
@selector
(panAction:)];
[gestureView addGestureRecognizer:panGesture];
/*---------------长按手势-------------*/
// 长按手势
UILongPressGestureRecognizer
*longPressGesture = [[UILongPressGestureRecognizer
alloc
]
initWithTarget
:
self
action
:
@selector
(longPress:)];
//设置长安的最短时间
longPressGesture.minimumPressDuration = 3;
[gestureView addGestureRecognizer:longPressGesture];
/*---------------旋转手势-------------*/
// 旋转手势
UIRotationGestureRecognizer
*rotationGesture = [[UIRotationGestureRecognizer
alloc
]
initWithTarget
:
self
action
:
@selector
(rotation:)];
[gestureView addGestureRecognizer:rotationGesture];
/*----------捏合手势--------------*/
UIPinchGestureRecognizer
*pinch = [[UIPinchGestureRecognizer
alloc
]
initWithTarget
:
self
action
:
@selector
(pinchAction:)];
[gestureView addGestureRecognizer:pinch];
}
//单击
- (void)tap1Action:(UITapGestureRecognizer *)tap1
{
NSLog(@"
单击
");
}
//双击
- (void)tap2Action:(UITapGestureRecognizer *)tap2
{
NSLog(@"
双击
");
}
//轻扫
- (
void
)swipe:(UISwipeGestureRecognizer *)swipe
{
if
(swipe.
direction
==
UISwipeGestureRecognizerDirectionUp) {
NSLog(@"
向上清扫
");
}
}
//平移
- (
void
)panAction:(UIPanGestureRecognizer *)pan
{
CGPoint p = [pan
locationInView:pan.view];
NSLog(
@"%@"
, NSStringFromCGPoint(p));
}
//长按
- (
void
)longPress:(UILongPressGestureRecognizer *)longPress
{
if
(longPress.
state
==
UIGestureRecognizerStateBegan) {
NSLog(@"
开始长按
");
}
else
if
(longPress.
state
==
UIGestureRecognizerStateEnded) {
NSLog(@"
结束长按
");
}
}
//旋转
- (
void
)rotation:(UIRotationGestureRecognizer *)rotation
{
//获取旋转角度---弧度
CGFloat r =
rotation.rotation;
//弧度转角度
//180/Pi = x/r
NSLog(@"r is %.2f", 180 / M_PI * r);
}
//捏合
- (void)pinchAction:(UIPinchGestureRecognizer
*)pinch
{
//获得捏合的比例
CGFloat scale =
pinch.scale;
// pinch.view.transform =
CGAffineTransformScale(pinch.view.transform, scale, scale);
pinch.view.transform = CGAffineTransformMakeScale(scale,
scale);
}
