添加计时器以计算时间 UIButton 按下 iPhone

Question

如何添加计时器来检测在 iPhone 上按下 UIButton 的时间？

谢谢

Answer 1

在 your.h 文件中将 buttonPressedStartTime 声明为 CFTimeInterval。

按下按钮时，存储当前时间：

buttonPressedStartTime = CFAbsoluteTimeGetCurrent();    

当用户开始狂欢时，

float deltaTimeInSeconds = CFAbsoluteTimeGetCurrent() - buttonPressedStartTime;

Answer 2

 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
      //Check here for touch is in your button frame than add
     [self performSelector:@selector(judgeLongPresstime) withObject:nil afterDelay:YourDelayTimeCheck];
 }

 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
     [NSObject cancelPreviousPerformRequestWithTarget:self];
 }

 -(void)judgeLongPresstime
 {
      //Add timer here and get time of increaseing.
 }

Answer 3

尝试这个：

// somewhere in interface
NSDate *_startDate;


- (IBAction)buttonDown:(id)sender {
    _startDate = [[NSDate date] retain];
}


- (IBAction)buttonUp:(id)sender {
    NSTimeInterval pressedForInSeconds = [[NSDate date] timeIntervalSince1970] - [startDate timeIntervalSince1970];
    NSLog(@"button was pressed for: %d seconds", pressedForInSeconds);
    [_startDate release];
}

然后将buttonDown:操作连接到“Touch down inside”插座，并将buttonUp:连接到 Interface Builder 中按钮连接选项卡中的“Touch up inside”或“Touch up outside”插座。