UIAlertView在哪里生活而不被解雇 [英] Where Does A UIAlertView Live While Not Dismissed

问题描述

有谁知道在哪个子视图中有一个活动的UIAlertView，或者如何找到它运行的线程？

Does anyone know in whose subview an active UIAlertView is located or how to find the thread in which it is running?

推荐答案

如果您转储 windows属性以及所有视图的所有子视图，您可以看到UIAlertView位于覆盖主窗口的单独窗口中。这里我有一个带有viewcontroller和tableview的导航栏（我删除了它的子视图，因为它们不相关）。

If you dump the contents of the windows property and all subviews of all views you can see that the UIAlertView is in a separate window that overlays the main window. Here I have a navbar with a viewcontroller and a tableview (I removed its subviews since they're not relevent).

<UIWindow: 0x411fd50; frame = (0 0; 320 480); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x4120af0>>
: <UILayoutContainerView: 0x4123310; frame = (0 0; 320 480); autoresize = W+H; layer = <CALayer: 0x411f800>>
: | <UINavigationTransitionView: 0x4123500; frame = (0 0; 320 480); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0x41232e0>>
: | : <UIViewControllerWrapperView: 0x4519d30; frame = (0 64; 320 416); autoresize = W+H; layer = <CALayer: 0x4519a40>>
: | : | <UITableView: 0x7808000; frame = (0 0; 320 416); clipsToBounds = YES; autoresize = W+H; layer = <CALayer: 0x45182a0>>
: | <UINavigationBar: 0x45018b0; frame = (0 20; 320 44); clipsToBounds = YES; autoresize = W; layer = <CALayer: 0x4500fe0>>
: | : <UINavigationItemView: 0x4522a20; frame = (100 8; 160 27); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x4526310>>
: | : <UINavigationItemButtonView: 0x45230a0; frame = (5 7; 87 30); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x4520260>>
<_UIAlertOverlayWindow: 0x4179b70; frame = (0 0; 320 480); opaque = NO; layer = <CALayer: 0x4188dc0>>
: <UIAlertView: 0x4194bc0; frame = (3.8 161.95; 312.4 177.1); transform = [1.1, 0, 0, 1.1, 0, 0]; opaque = NO; animations = { transform=<CABasicAnimation: 0x4191160>; opacity=<CABasicAnimation: 0x41226f0>; }; layer = <CALayer: 0x4144c30>>
: | <UILabel: 0x4177e70; frame = (12 15; 260 23); text = 'Name of Date'; clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x4179370>>
: | <UILabel: 0x418b100; frame = (12 45; 260 41); text = 'Name of the date that you...'; clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x4128450>>
: | <UIThreePartButton: 0x41942a0; frame = (11 102; 262 43); opaque = NO; tag = 1; layer = <CALayer: 0x4191f30>>

以下是生成转储的代码。我发现当有些事情没有按照我的预期行事时，看看会发生什么事情很有用：

Here is the code that produces the dump. I found it useful on occasion to see what is going on when something isn't doing what I expect:

void dumpView(UIView* aView, NSString* indent) {
    if (aView) {
        NSLog(@"%@%@", indent, aView);      // dump this view

        if (aView.subviews.count > 0) {
            NSString* subIndent = [[NSString alloc] initWithFormat:@"%@%@", 
                           indent, ([indent length]/2)%2==0 ? @"| " : @": "];
            for (UIView* aSubview in aView.subviews) dumpView( aSubview, subIndent );
            [subIndent release];
        }
    }
}

void dumpWindows() {
    for (UIWindow* window in [UIApplication sharedApplication].windows) {
        dumpView(window, @"dumpView: ");
    }   
}

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