Last active
August 29, 2015 13:56
-
-
Save nick-merrill/8871969 to your computer and use it in GitHub Desktop.
This is a convenience function to recursively run code on subviews of specified class types. It's untested, so please just use as a basis for something likely better, perhaps that includes IndexPath counting, etc.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /* | |
| Example use: | |
| // Return all labels of the cell | |
| NSMutableArray *labels = [Utility ApplyToSubviews:cell limitedToClass:[UILabel class] usingBlock:^(id obj) { | |
| UILabel *label = (UILabel *)obj; | |
| label.text = @"Changed text"; | |
| } recursively:YES]; | |
| */ | |
| /************************************************************* | |
| Pass nil as LimitingClass if objects of all class types | |
| should be included. | |
| Pass nil as blockToApply to not run a block. | |
| **************************************************************/ | |
| + (NSMutableArray *)ApplyToSubviews:(UIView *)superview | |
| limitedToClass:(Class)LimitingClass | |
| usingBlock:(void (^)(id obj))blockToApply | |
| recursively:(BOOL)isRecursive | |
| { | |
| return [Utility RecursiveApplyToSubviews:superview | |
| limitedToClass:LimitingClass | |
| usingBlock:blockToApply | |
| withCurrentObjects:[NSMutableArray arrayWithCapacity:0] | |
| recursively:isRecursive]; | |
| } | |
| + (NSMutableArray *)RecursiveApplyToSubviews:(UIView *)superview | |
| limitedToClass:LimitingClass | |
| usingBlock:(void (^)(id))blockToApply | |
| withCurrentObjects:(NSMutableArray *)currentObjectsOfClass | |
| recursively:(BOOL)isRecursive | |
| { | |
| NSArray *subviews = superview.subviews; | |
| if (![subviews count]) { | |
| return currentObjectsOfClass; | |
| } | |
| NSMutableArray *objectsOfClass = [NSMutableArray arrayWithCapacity:0]; | |
| [subviews enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { | |
| if (LimitingClass == nil || | |
| [obj isKindOfClass:[LimitingClass class]]) { | |
| [objectsOfClass addObject:obj]; | |
| if (blockToApply) { | |
| blockToApply(obj); // apply block to object | |
| } | |
| } | |
| if (isRecursive && [obj isKindOfClass:[UIView class]]) { | |
| NSMutableArray *newObjects = [Utility RecursiveApplyToSubviews:((UIView *)obj) limitedToClass:LimitingClass usingBlock:blockToApply withCurrentObjects:currentObjectsOfClass recursively:isRecursive]; | |
| [objectsOfClass addObjectsFromArray:newObjects]; | |
| } | |
| }]; | |
| return objectsOfClass; | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment