一键解决自定义返回按钮侧滑pop手势失效及VC子视图中包含UIS
新增：
解决
1.解决其他的对viewController中手势通过实现手势代理方法处理，造成手势方法不识别，而出现的崩溃。----2018.09.01
2.WKWebView.allowsBackForwardNavigationGestures = YES 时，WKWebView返回手势和侧滑手势的冲突----2018.04.18
解决思路
>使用自定义手势替换系统的侧滑手势
>target 及 action 不变
>将自定义手势添加到UIVIewController的view上，实现手势在不同vc中的不同响应
解决过程
1.使用自定义UIPanGestureRecognizer替换系统的手势
//设置系统手势不可用
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
//获取手势的代理对象
id target = self.navigationController.interactivePopGestureRecognizer.delegate;
//获取手势响应的方法
SEL backGestureSelector = NSSelectorFromString(@"handleNavigationTransition:");
panGesture = [[UIPanGestureRecognizer alloc]initWithTarget:target action:backGestureSelector];
2.添加并设置手势的代理为当前VC
if ([self.navigationController. respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
//使用自定义的手势替换系统的侧边触发手势
//设置手势的代理
[self syPanGesture].delegate = (self.sy_interactivePopDisabled == YES) ? nil : self;
//将自定义手势添加到vc的view上
[self.view addGestureRecognizer:[self syPanGesture]];
}
3.UIScrollView 手势的响应
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
//当panGesture相应失败时，才响应scrollView的拖动手势
[otherGestureRecognizer requireGestureRecognizerToFail:gestureRecognizer];
return YES;
}
4.UISlider的响应
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
//当拖动的是slider时，该事件不让panGesture手势响应
if ([touch.view isKindOfClass:[UISlider class]]) {
return NO;
}
return YES;
}
5.拖动中其他状态的处理
- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer {
if ([[self.navigationController valueForKey:@"_isTransitioning"] boolValue]) {
return NO;
}
if ([self.navigationController.transitionCoordinator isAnimated]) {
return NO;
}
if (self.navigationController.viewControllers.count < 2) {
return NO;
}
return YES;
}
6.实现全屏和侧边响应
- (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer {
if ([[self.navigationController valueForKey:@"_isTransitioning"] boolValue]) {
return NO;
}
if ([self.navigationController.transitionCoordinator isAnimated]) {
return NO;
}
if (self.navigationController.viewControllers.count < 2) {
return NO;
}
// 侧滑手势触发位置
CGPoint location = [gestureRecognizer locationInView:self.view];
CGPoint offSet = [gestureRecognizer translationInView:gestureRecognizer.view];
//触发宽度，
CGFloat maxLocationX = self.sy_isFullPopGesture == YES ? CGRectGetWidth(self.view.bounds) : 40.f;
//当是全屏返回手势时，使用整个宽度
BOOL ret = (0 < offSet.x && location.x <= maxLocationX);
return ret;
}
代码Demo
GitHub ：SYPopGesture
参考资料
1.全屏返回手势 FDFullscreenPopGesture
2.一行代码，让你的应用中UIScrollView的滑动与侧滑返回并存 TZPopGesture
