带时间浮点的NSUserDefaults [英] NSUserDefaults with time floats

问题描述

我正在制作一个游戏，用户必须尽快完成一项任务，我想要显示用户的最佳时间，并更新最佳的时间，当他或她达到一个新的。我有：
$ b $ pre $ float BestTimeValue
float starttime
- （void）start {
starttime + = 0.001;
timelabel.text = [NSString stringWithFormat：@％。3f，starttime]; （starttime< BestTimeValue）{
[[NSUserDefaults standardUserDefaults] setObject：starttime forKey：[@BestTimeValue];
}
。
}


和在我的viewdidload中：

  BestTimeValue = [[NSUserDefaults standardUserDefaults] objectForKey：@BestTimeSaved]; 
  

开始时间在游戏结束时停止，但值不会显示在标签中。谢谢！

解决方案

<[NSUserDefaults standardUserDefaults] setObject：forKey：]正如名称所示，它只接受NSString，NSNumber ，NSDictionary等。

所以你必须使用其他方法[[NSUserDefaults standardUserDefaults] setFloat：forKey]或将浮点保存在NSNumber中以使用setObjet方法[NSNumber numberWithFloat：thefloat];

I'm making a game in which the user must complete a task as quickly as possible, and I would like to display the user's best time and update the best time when he or she achieves a new one. I have:

float BestTimeValue
float starttime
-(void)start{
starttime += 0.001;
timelabel.text = [NSString stringWithFormat:@"%.3f", starttime];
}
if (starttime < BestTimeValue) {
    [[NSUserDefaults standardUserDefaults] setObject:starttime forKey:[@"BestTimeValue"];
}

and in my viewdidload:

BestTimeValue = [[NSUserDefaults standardUserDefaults] objectForKey:@"BestTimeSaved"];

starttime stops when the game is over, but the value won't display in the label. Thanks!

解决方案

[[NSUserDefaults standardUserDefaults] setObject: forKey:] As the name says, it only accept object like NSString, NSNumber, NSDictionary, etc.

So you have to use other method [[NSUserDefaults standardUserDefaults] setFloat: forKey] or save the float in a NSNumber to use the setObjet Method [NSNumber numberWithFloat:thefloat];

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