Ios 在功能启动Objective-C之前按下两次

很抱歉，如果标题有点草率或混乱，我会尽量解释得更详细一点

我的应用程序中有一个功能，允许用户每天只使用10次。下面的代码处理每天的计数，这实际上工作得很好，只是在调用新循环之前，用户必须在新循环上按两下

我认为这与

fabs

功能有关，或者用户在新循环上必须按两次的原因是什么

-(void)dailyCount:(id)sender{
    NSString *kFirstLaunchDateKey = @"tenPerDay";
    NSDate *firstLaunchDate = [[NSUserDefaults standardUserDefaults] objectForKey:kFirstLaunchDateKey];
    NSInteger count = [[NSUserDefaults standardUserDefaults] integerForKey:@"perDay"];

    if (!firstLaunchDate) {
        [[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:kFirstLaunchDateKey];
        [[NSUserDefaults standardUserDefaults] setInteger:count+1 forKey:@"perDay"];

        return;
    }

    NSTimeInterval diff = fabs([firstLaunchDate timeIntervalSinceNow]);
    if (diff > 60 * 60 * 24 * 1) {
        [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"tenPerDay"];
        [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"perDay"];
    }else{
        if (count % 11 == 0) {
            [UIAlertView showWithTitle:@"Daily Limit Exceeded"
                               message:@"Sorry, you can use this option only 10 times per day."
                     cancelButtonTitle:@"Ok"
                     otherButtonTitles:nil
                              tapBlock:^(UIAlertView *alertView, NSInteger buttonIndex) {
                                  if (buttonIndex == [alertView cancelButtonIndex]) {

                                  }
                              }];
        }else {
            // do something here... (Have to press twice on a new loop before it's getting called)

            [[NSUserDefaults standardUserDefaults] setInteger:count+1 forKey:@"perDay"];
            [[NSUserDefaults standardUserDefaults] synchronize];
        } 
    }
}

---

如果没有firstLaunchDate，它将创建一个新的启动日期，但返回时不做任何操作，这不是因为您的初始条件吗？然后，当您再次按下它时，它将实际开始执行某些操作。您是否正在执行

count%11==0

，而不只是检查

count>10

？另外，为什么要删除每天存储在

中的对象而不是将其设置为0？感谢大家指出，修复了它，将在几秒钟内发布答案。只支持代码的答案是不受欢迎的。解释问题是什么以及答案是如何解决的。正如@Yarneo所说，方法if（firstlaunchdate）将第一次被调用，并且它只设置了NSUSERDefault，因此我将函数拆分为在另一个空格中进行计数，并在if（firstlaunchdate）中调用它。但我真的很惊讶我没有看到那个。
-(void)dailyCount:(id)sender{

    NSString *kFirstLaunchDateKey = @"tenPerDay";
    NSDate *firstLaunchDate = [[NSUserDefaults standardUserDefaults] objectForKey:kFirstLaunchDateKey];

    if (!firstLaunchDate) {

        [[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:kFirstLaunchDateKey];
        [[NSUserDefaults standardUserDefaults] setInteger:0 forKey:@"perDay"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        [self counterNew];

        return;
    }

    NSTimeInterval diff = fabs([firstLaunchDate timeIntervalSinceNow]);
    if (diff > 60 * 60 * 24 * 1) {

        [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"tenPerDay"];
        [[NSUserDefaults standardUserDefaults] setInteger:0 forKey:@"perDay"];
        [[NSUserDefaults standardUserDefaults] synchronize];

        [self counterNew];

    }else{


        [self counterNew];

    }
}

-(void)counterNew{

    NSInteger count = [[NSUserDefaults standardUserDefaults] integerForKey:@"perDay"];

    if (count > 10) {

        [UIAlertView showWithTitle:@"Daily Limit Exceeded"
                           message:@"Sorry, you can use this option only 10 times per day."
                 cancelButtonTitle:@"Ok"
                 otherButtonTitles:nil
                          tapBlock:^(UIAlertView *alertView, NSInteger buttonIndex) {
                              if (buttonIndex == [alertView cancelButtonIndex]) {

                              }
                          }];

    }else {


        //Do something here...

        [[NSUserDefaults standardUserDefaults] setInteger:count+1 forKey:@"perDay"];
        [[NSUserDefaults standardUserDefaults] synchronize];

    }
}