1、集合數(shù)組創(chuàng)建

    NSMutableArray *bleDeviceArray = [[NSMutableArray alloc]initWithCapacity:0]
    [bleDeviceArray addObject:@{@"name":@"device"}];

2、結(jié)構(gòu)體創(chuàng)建

 NSDictionary *data = @{
                        @"code":@"0",
                        @"result":@"",
                    };

3、判斷是否有這個(gè)key

 NSDictionary *data = @{
                        @"code":@"0",
                        @"result":@"",
                    };
if([[data allKeys] containsObject:@"second"]){
}

4、取值

 NSDictionary *data = @{
                        @"code":@"0",
                        @"result":@"",
                    };
NSString *mac = [data objectForKey:@"code"]