iphone - iOS 上 View 层级的可视化

Question

在开发 iOS 应用程序时，我发现在调试器中使用 po [[UIWindow keyWindow] recursiveDescription] 非常有用。但是，我想知道是否有一种工具可以优雅地表示输出以提高可读性？

Answer 1

这是我以前写的一个方法:

- (void)logView:(UIView*)v index:(int)i
{
    NSMutableString *str = [NSMutableString string];
    for (int u = 0; u<i; u++) { [str appendString:@"| "]; }
    [str appendFormat:@"<%@ %p frame:%@>", v.class, v, NSStringFromCGRect(v.frame)];
    // of course you can change it to display your accessibility hint/label
    printf("%s\n", [str UTF8String]);

    for (UIView *vv in v.subviews) { [self logView:vv index:i+1]; }
}

这样调用:[self logView:myView index:0];

示例输出:

<UITextField 0x6b30010 frame:{{20, 13}, {280, 31}}>
| <UITextFieldRoundedRectBackgroundView 0x6b31e00 frame:{{0, 0}, {280, 31}}>
| | <UIImageView 0x6b31fe0 frame:{{0, 0}, {0, 0}}>
| | <UIImageView 0x6b32070 frame:{{0, 0}, {0, 0}}>
| | <UIImageView 0x6b320e0 frame:{{0, 0}, {0, 0}}>