重写NSArray与NSDictionary的descriptionWithLocale方法

更新1--2017年9月7日
最近发现，自从升级到Xcode8以后，字典和数组的descriptionWithLocale都不再被调用。后来使用
- (NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level来取代，一切又恢复到正常。望周知。

重写NSArray的descriptionWithLocale方法:

NSArray+log.h

?

1 2 3

#import <Foundation/Foundation.h> @interface NSArray (log) @end

 NSArray+log.m

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

#import "NSArray+log.h" @implementation NSArray (log)   - (NSString *)descriptionWithLocale:(id)locale {     NSMutableString *string = [NSMutableString string];           // 开头有个[     [string appendString:@"[\n"];           // 遍历所有的元素     [self enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {         [string appendFormat:@"\t%@,\n", obj];     }];           // 结尾有个]     [string appendString:@"]"];           // 查找最后一个逗号     NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];     if (range.location != NSNotFound)         [string deleteCharactersInRange:range];           return string; }   @end

 

重写NSDictionary的descriptionWithLocale方法:

NSDictionary.h

?

1 2 3

#import <Foundation/Foundation.h> @interface NSDictionary (log) @end

NSDictionary.m

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

#import "NSDictionary+log.h" @implementation NSDictionary (log)   - (NSString *)descriptionWithLocale:(id)locale {     NSMutableString *string = [NSMutableString string];           // 开头有个{     [string appendString:@"{\n"];           // 遍历所有的键值对     [self enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {         [string appendFormat:@"\t%@", key];         [string appendString:@" : "];         [string appendFormat:@"%@,\n", obj];     }];           // 结尾有个}     [string appendString:@"}"];           // 查找最后一个逗号     NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];     if (range.location != NSNotFound)         [string deleteCharactersInRange:range];           return string; }   @end