是否有视图控制器层次结构的recursiveDescription方法？ [英] Is there a recursiveDescription method for the view controller hierarchy?

问题描述

recursiveDescription 非常有用。查看控制器层次结构也非常重要，是否有相应的内容？

recursiveDescription is very useful when debugging a hierarchy of views. View controller hierarchies are also very important, is there an equivalent for this?

推荐答案

更新 - 类似的功能现在以Apple提供的形式提供，只需 _printHierarchy 方法，因此您不再需要此类别。

Update - similar functionality is now available in Apple-supplied form as the _printHierarchy method, so you don't need this category any more.

现在有：

Github：视图控制器的递归描述类别。

这会添加 recursiveDescription 方法到 UIViewController ，它打印出视图控制器层次结构。非常适合检查您是否正确添加和删除子视图控制器。

This adds a recursiveDescription method to UIViewController which prints out the view controller hierarchy. Excellent for checking if you are adding and removing your child view controllers properly.

代码非常简单，包括在这里以及上面的GitHub链接：

The code is very simple, included here as well as the GitHub link above:

@implementation UIViewController (RecursiveDescription)

-(NSString*)recursiveDescription
{
    NSMutableString *description = [NSMutableString stringWithFormat:@"\n"];
    [self addDescriptionToString:description indentLevel:0];
    return description;
}

-(void)addDescriptionToString:(NSMutableString*)string indentLevel:(NSInteger)indentLevel
{
    NSString *padding = [@"" stringByPaddingToLength:indentLevel withString:@" " startingAtIndex:0];
    [string appendString:padding];
    [string appendFormat:@"%@, %@",[self debugDescription],NSStringFromCGRect(self.view.frame)];

    for (UIViewController *childController in self.childViewControllers)
    {
        [string appendFormat:@"\n%@>",padding];
        [childController addDescriptionToString:string indentLevel:indentLevel + 1];
    }
}

@end

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