iOS 数组／字典转模型

    NSMutableArray *tempArr = [NSMutableArray array];    NSMutableDictionary *dic = [NSMutableDictionary dictionary];    for (int i = 0; i < self.dataSourceArr.count; i++) {    //便利一下数组得到模型，这里不能用for - in ，拿到模型之后把值取出来放入可变字典中        PerponModel *model = self.dataSourceArr[i];        [dic setValue:model.name forKey:@"realname"];        [dic setValue:model.phoneNumber forKey:@"mobile"];        [tempArr addObject:dic];    }    //tempArr是一个可变数组    //NSJSONWritingPrettyPrinted是一个枚举    //dataWithJSONObject:(这个是一个id类型的可以是字典，字典放进去就可以把字典转成json)    NSData *data = [NSJSONSerialization dataWithJSONObject:tempArr options:NSJSONWritingPrettyPrinted error:nil];    NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];