判断两个控件在同一个Window上是否有重叠
//对UIView写分类 - (BOOL)intersectWithView:(UIView *)view; - (BOOL)intersectWithView:(UIView *)view { UIWindow *window = [UIApplication sharedApplication].keyWindow; CGRect selfRect = [self convertRect:self.bounds toView:window]; CGRect viewRect = [view convertRect:view.bounds toView:window]; return CGRectIntersectsRect(selfRect, viewRect); }
添加一个更高级别的UIWindow,目的点击状态栏时让ScrollView滚动到顶部
//.h文件 #import <Foundation/Foundation.h> @interface JGTopWindow : NSObject + (void)show; @end //.m文件 #import "JGTopWindow.h" @implementation JGTopWindow static UIWindow *window_; + (void)show { dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ window_ = [[UIWindow alloc] init]; window_.frame = [UIApplication sharedApplication].statusBarFrame; // 窗口默认显示黑色 window_.backgroundColor = [UIColor clearColor]; // UIWindowLevelAlert > UIWindowLevelStatusBar > UIWindowLevelNormal // 窗口默认等级是UIWindowLevelNormal,等级最低,放在最下层,点击手势被拦截,无法被监听到 window_.windowLevel = UIWindowLevelAlert; // 默认是隐藏的 window_.hidden = NO; [window_ addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(topWindowClick)]]; }); } + (void)topWindowClick { // 主窗口 UIWindow *window = [UIApplication sharedApplication].keyWindow; // 查找主窗口中的所有scrollView [self findScrollViewsInView:window]; } /** * 查找view中的所有scrollView */ + (void)findScrollViewsInView:(UIView *)view { // 利用递归查找所有的子控件 for (UIView *subview in view.subviews) { [self findScrollViewsInView:subview]; } if (![view isKindOfClass:[UIScrollView class]]) return; // 判断是否跟window有重叠 if (![view intersectWithView:[UIApplication sharedApplication].keyWindow]) return; // CGRect windowRect = [UIApplication sharedApplication].keyWindow.bounds; // CGRect viewRect = [view convertRect:view.bounds toView:nil]; // // 跟window不重叠 // if (!CGRectIntersectsRect(windowRect, viewRect)) return; // 如果是scrollView UIScrollView *scrollView = (UIScrollView *)view; // 修改offset CGPoint offset = scrollView.contentOffset; offset.y = - scrollView.contentInset.top; [scrollView setContentOffset:offset animated:YES]; // [scrollView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES]; } @end
判断两个控件在同一个Window上是否有重叠
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