问题集

• 不锁屏

看视频、倒计时等这些页面需要禁止锁屏功能时，按照以下方法来：

设置应用程序的 idleTimerDisabled 属性为 YES （默认为NO）

[UIApplication sharedApplication].idleTimerDisabled=YES;
//当然一定要慎用，记着退出程序时把自动休眠功能开启

• 仍然小白

 1     int counter = 0;
 2     for (counter = 0; counter < 3; counter++) {
 3         NSLog(@"counterin = %d", counter);
 4         if (counter == 2) {
 5             break;
 6         }
 7     }
 8     NSLog(@"counterout = %d", counter);
 9 //  counterin = 0
10 //  counterin = 1
11 //  counterin = 2
12 //  counterout = 2

vs

1     int counter = 0;
2     for (counter = 0; counter < 3; counter++) {
3         NSLog(@"counterin = %d", counter);
4     }
5     NSLog(@"counterout = %d", counter);
6 //  counterin = 0
7 //  counterin = 1
8 //  counterin = 2
9 //  counterout = 3

∴ End

转载于:https://www.cnblogs.com/sunflower3lucky/p/3927701.html