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黑马程序员——OC基础之NSMutableDictionary

2015-12-06 12:17 429 查看

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int main(int argc, const char * argv[]) {

@autoreleasepool {

      NSMutableDictionary *dict1 = [NSMutableDictionary dictionary];

      NSMutableDictionary *dict2 = [NSMutableDictionary dictionaryWithCapacity:3];

      [dict1 setValue:@"lisi" forKey:@"ls"];//key值重复，添加失败

      [dict1 setValue:@"zhaosi" forKey:@"ls"];

      [dict1 setValue:@"liuneng" forKey:@"ln"];

      NSLog(@"%@",dict1);

//       [dict1 removeObjectForKey:@"ls"];

//       NSLog(@"%@",dict1);

//       [dict1 removeAllObjects];

//       NSLog(@"%@",dict1);

      [dict1 setObject:@"lisi" forKey:@"ls"];

      dict1[@"ls"] = @"xxx";

      NSLog(@"%@",dict1);

      NSArray *arr1 = [dict1 allKeys];

      if ([arr1 containsObject:@"ls"]) {

         NSLog(@"存在ls的key");

      }

}

return 0;

}

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标签： NSMutableDictionary

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