只用一个pan手势来代替UISwipegesture的各个方向

最新推荐文章于 2024-03-25 15:50:42 发布

wownbafifa

最新推荐文章于 2024-03-25 15:50:42 发布

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分类专栏： iOS开发文章标签： iOS 手势

本文链接：https://blog.youkuaiyun.com/wownbafifa/article/details/51065003

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本文介绍了一种方法，通过一个pan手势来替代UISwipegesture的上下左右四个方向的操作，详细解释了如何根据手势的速度和方向判断并执行相应的操作。

只用一个pan手势来代替UISwipegesture的各个方向：

-(void)pan:(UIPanGestureRecognizer*)sender
{
typedefNS_ENUM(NSUInteger,UIPanGestureRecognizerDirection){
UIPanGestureRecognizerDirectionUndefined,
UIPanGestureRecognizerDirectionUp,
UIPanGestureRecognizerDirectionDown,
UIPanGestureRecognizerDirectionLeft,
UIPanGestureRecognizerDirectionRight
};
staticUIPanGestureRecognizerDirectiondirection=UIPanGestureRecognizerDirectionUndefined;
switch(sender.state){
caseUIGestureRecognizerStateBegan:{
if(direction==UIPanGestureRecognizerDirectionUndefined){
CGPointvelocity=[sendervelocityInView:recognizer.view];
BOOLisVerticalGesture=fabs(velocity.y)>fabs(velocity.x);
if(isVerticalGesture){
if(velocity.y>0){
direction=UIPanGestureRecognizerDirectionDown;
}else{
direction=UIPanGestureRecognizerDirectionUp;
}
}
else{
if(velocity.x>0){
direction=UIPanGestureRecognizerDirectionRight;
}else{
direction=UIPanGestureRecognizerDirectionLeft;
}
}
}
break;
}
caseUIGestureRecognizerStateChanged:{
switch(direction){
caseUIPanGestureRecognizerDirectionUp:{
[selfhandleUpwardsGesture:sender];
break;
}
caseUIPanGestureRecognizerDirectionDown:{
[selfhandleDownwardsGesture:sender];
break;
}
caseUIPanGestureRecognizerDirectionLeft:{
[selfhandleLeftGesture:sender];
break;
}
caseUIPanGestureRecognizerDirectionRight:{
[selfhandleRightGesture:sender];
break;
}
default:{
break;
}
}
break;
}
caseUIGestureRecognizerStateEnded:{
direction=UIPanGestureRecognizerDirectionUndefined;
break;
}
default:
break;
}
}