藍懿教育九月二十日

標籤：藍懿教育 劉國斌 ios 培訓

字典是無序的

建立字典

• NSMutableDictionary *dic=[NSMutableDictionary dictionary];

• NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithObject:@"張三" forKey:@"name"];

字典添加資料

[dic setObject:@"張小三"forKey:@"sonName"];

[dic setObject:@[@"小明",@"小李",@"小張"] forKey:@"firends"];

從字典中取資料

NSString *name = [dic objectForKey:@"sonName"];

NSArray *firendArr = dic[@"firends"];

遍曆字典

    NSArray *keys = dic.allKeys;

   
    for (NSString *key in keys) {
        NSObject *obj = dic[key];
        NSLog(@"字典中裝的是：%@",obj);
       

    }

藍懿教育九月二十日