[示例]NSDictionary-数组中增加字典，并遍历数组

代码：

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSDictionary *dic1=@{@"name":@"yang",
                             @"class":@"IOS6",
                             @"age":@"24"};
        NSDictionary *dic2=@{@"name":@"ming",
                             @"class":@"IOS8",
                             @"age":@"27"};
        NSMutableArray *arr1=[NSMutableArray array];    //初始化数组
        [arr1 addObject:dic1];      //将字典增加位数组元素
        [arr1 addObject:dic2];
        for(int i=0;i<arr1.count;i++) {     //下标法遍历数组
            NSDictionary *dic=arr1[i];
            NSLog(@"班级：%@，姓名：%@，年龄：%@",dic[@"name"],dic[@"class"],dic[@"age"]);     //dic[@"xxx"]是[dic objectForKey:xxx]的简写形式
        }
    }
    return 0;
}