iOS 遍历所有子视图subviews的2种方法

在做项目的过程中，难免有时候会需要利用父子视图的关系去调用一些behavior。

方法一，比较直接

    for (UIView *subViews in yourView.subviews) {  
        [self removSubviews:subViews];  
    }     
      
    -(void)removSubviews:(UIView *)subView  
    {  
      if (subView.subviews.count>0) {  
        for (UIView *subViews in subView.subviews) {  

           [self removSubviews:subViews];  
        }  
      }  
      else  
      {  
         NSLog(@"%i",subView.subviews.count);  
        [subView removeFromSuperview];  
      }  
    }  

方法二，用类别

// UIView+HierarchyLogging.h  
@interface UIView (ViewHierarchyLogging)  
- (void)logViewHierarchy;  
@end  
  
// UIView+HierarchyLogging.m  
@implementation UIView (ViewHierarchyLogging)  
- (void)logViewHierarchy  
{  
    NSLog(@"%@", self);  
    for (UIView *subview in self.subviews)  
    {  
        [subview logViewHierarchy];  
    }  
}  
@end  
  
// In your implementation  
[myView logViewHierarchy];