24点小游戏ios开发（一）

cocoa社区有很多iOS的小游戏源码（没有24点的大概是因为它落后了...?）,我下载了很多来作为参考。游戏源码已传至github:https://github.com/DF-L/24

先是最终的界面：

先是一个计时器的代码，参考了一个touchme的源码。实现按下开始按钮之后开始计时的功能，并记录每次的计时到总时间

.h文件中：NSTimer *timer;

-(void)subtracTime;.m文件中：timer = [NSTimer scheduledTimerWithTimeInterval:1.0f                                             target:self                                           selector:@selector(subtracTime)                                           userInfo:nil                                            repeats:YES];//计时器-(void)subtracTime{//计时器    if(count!=0){        second+=1;        lable18++;    }    timerLabel.text = [NSString stringWithFormat:@"Time:%d",second];    if(second == 30)    {        [timer invalidate];                UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Times Out"                                                                       message:[NSString stringWithFormat:@"Score:%d",score] preferredStyle:UIAlertControllerStyleAlert];                scoreLabel.text = [NSString stringWithFormat:@"Score:%d",score];                UIAlertAction *againAction = [UIAlertAction actionWithTitle:@"Again"                                                              style:UIAlertActionStyleCancel                                                            handler:nil];        [alert addAction:againAction];        [self presentViewController:alert animated:YES completion:nil];        [self setGame];    }}timerLabel.text = [NSString stringWithFormat:@"倒计时:%d",second];lable10.text =[NSString stringWithFormat:@"总时间:%d",lable18];