数组

作者: yaya_pangdun | 来源:发表于2016-07-29 09:40 被阅读8次

打印数组

#import "NSArray+Log.h"

@implementation NSArray (Log)

- (NSString *)descriptionWithLocale:(id)locale
{
    NSMutableString *strM = [NSMutableString stringWithString:@"(\n"];
    
    for (id obj in self) {
        [strM appendFormat:@"\t%@,\n", obj];
    }
    
    [strM appendString:@")\n"];
    
    return strM;
}

@end

数组排序

array = [array sortedArrayUsingComparator:^NSComparisonResult(NSNumber* obj1, NSNumber* obj2){
   return [obj1 compare:obj2];
}];

数组乱序

array = [array sortedArrayUsingComparator:^NSComparisonResult(NSNumber* obj1, NSNumber* obj2){
   int seed = arc4random_uniform(2); //-> 0、1
   if(seed) {
      return [obj1 compare:obj2];
   } else {
      return [obj2 compare:obj1];
   }
}];