Xcode一直加2而不是1 [英] Xcode is adding 2 instead of 1 all the time
问题描述
可能重复:
Xcode:为什么我的计时器在每个刻度上都计数2秒?
在我的应用中,我有一个计时器,该计时器应从12:00到0:00,但每次滴答都需要2秒,就像这样:
11.58
11.56
11.54
11.52依此类推..
这是开始按钮代码中的代码:
tid.text = [NSString stringWithFormat:@%d:%。2d,minder,sekunder];
timer = [NSTimercheduledTimerWithTimeInterval:1.0
目标:自我
选择器:@selector(tidklick)
userInfo:nil
重复:是];
这是tidklick的方法:
-(void)tidklick
{
tiden-= 1;
sekunder = tiden%60;
分钟==(tiden-sekunder)/ 60;
tid.text = [NSString stringWithFormat:@%d:%。2d,分钟数,sekunder];
}
这是开头的代码。
int tiden = 720;
int sekunder;
int分钟;
当我按下某个按钮时,也会发生这种情况: i ++;
,但是 i似乎被
2添加了
每次我按下按钮时......
怎么了? :S好像是用Xcode而不是我的代码?
编辑:现在我注意到,当我按下按钮时,应该最终停止计时器(计时器无效) ,就算是正常的……一次也就是一秒钟!
预先感谢!
p>
定时器触发间隔大约 等于1秒。
Possible Duplicate:
Xcode: Why is my timer count 2 seconds on every tick?
In my app I have a timer that should go from 12:00 to 0:00, but it counts 2 seconds on every tick like this:
11.58
11.56
11.54
11.52 and so on..
this is the code in the start button code:
tid.text=[NSString stringWithFormat:@"%d:%.2d",minuter,sekunder];
timer= [NSTimer scheduledTimerWithTimeInterval:1.0
target:self
selector:@selector(tidklick)
userInfo:nil
repeats:YES];
This is the method tidklick:
-(void) tidklick
{
tiden -= 1;
sekunder = tiden % 60;
minuter= (tiden - sekunder) / 60;
tid.text=[NSString stringWithFormat:@"%d:%.2d",minuter,sekunder];
}
This is the code in the beginning..
int tiden=720;
int sekunder;
int minuter;
and also when I hit a certain button, this should happen: i++;
but it seems like i
gets added by 2
every time I hit the button....
What is wrong? :S Seems like something with Xcode and not my code?
EDIT: Now I noticed that when I hit the button that should stop the timer in the end(timer invalidate), it counts as normal... It counts one second at a time that is!
Thanks in advance!
For better time counting try to use NSDate methods: [NSDate date] for start value and [NSDate timeIntervalSinceDate:startTime] to get time shift from the start.
Timer firing interval is approximately equals to 1 second.
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