iOS开发 自定义窗口 以及 点击scrollView置顶

static UIWindow *topWindow_;

static UIScrollView *scrollView_;

/**

* 显示顶部窗口

*/

+ (void)show

{

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

topWindow_ = [[UIWindow alloc] init];

topWindow_.windowLevel = UIWindowLevelAlert;

topWindow_.frame = CGRectMake(60, 0, fView_Width(kWindow), 20);

topWindow_.backgroundColor = [UIColor clearColor];

topWindow_.hidden = NO;

[topWindow_ addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(topWindowClick)]];

});

}

/**

* 监听顶部窗口点击

*/

+ (void)topWindowClick

{

UIWindow *keyWindow = [UIApplication sharedApplication].keyWindow;

[self searchAllScrollViewsInView:keyWindow];

}

/**

* 找到参数view中所有的UIScrollView

*/

+ (void)searchAllScrollViewsInView:(UIView *)view

{

// 递归遍历所有的子控件

for (UIView *subview in view.subviews) {

[self searchAllScrollViewsInView:subview];

}

// 判断子控件类型(如果不是UIScrollView，直接返回)

if (![view isKindOfClass:[UIScrollView class]]) return;

// 找到了UIScrollView

UIScrollView *scrollView = (UIScrollView *)view;

// 让UIScrollView滚动到最前面

// 让CGRectMake(0, 0, 1, 1)这个矩形框完全显示在scrollView的frame框中

//  [scrollView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];

if (scrollView == scrollView_) {

[scrollView setContentOffset:CGPointMake(scrollView.contentOffset.x, -scrollView.contentInset.top) animated:YES];

}

}

+ (void)configScrollView:(UIScrollView *)scrollView {

scrollView_ = scrollView;

}