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递归查找subview
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| #import <UIKit/UIKit.h> | |
| @interface UIView (Recursion) | |
| /** | |
| Return YES from the block to recurse into the subview. | |
| Set stop to YES to return the subview. | |
| */ | |
| - (UIView*)findViewRecursively:(BOOL(^)(UIView* subview, BOOL* stop))recurse; | |
| @end | |
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| #import "UIView+Recursion.h" | |
| @implementation UIView (Recursion) | |
| - (UIView*)findViewRecursively:(BOOL(^)(UIView* subview, BOOL* stop))recurse | |
| { | |
| for( UIView* subview in self.subviews ) { | |
| BOOL stop = NO; | |
| if( recurse( subview, &stop ) ) { | |
| return [subview findViewRecursively:recurse]; | |
| } else if( stop ) { | |
| return subview; | |
| } | |
| } | |
| return nil; | |
| } | |
| @end |
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