uibutton - 如何防止UIButton在更新标题时闪烁

Question

当我在 UIButton 上调用 setTitle 时，按钮在 iOS 7 中闪烁。我尝试设置 myButton.highlighted = NO，但这并没有阻止按钮闪烁。

[myButton setTitle:[[NSUserDefaults standardUserDefaults] stringForKey:@"elapsedLabelKey"] forState:UIControlStateNormal];

myButton.highlighted = NO;

以下是我设置更新标题的计时器的方法:

- (void)actionTimer {
    if (myTimer == nil) {

        myTimer = [NSTimer scheduledTimerWithTimeInterval: 1.0
                        target: self
                        selector: @selector(showActivity)
                        userInfo: nil
                        repeats: YES];
    }
}

这是实际更新标题的方法:

- (void)showActivity {

    NSString *sym = [[NSLocale currentLocale] objectForKey:NSLocaleCurrencySymbol];

    if (pauseInterval == nil) {

        // Update clock
        seconds = [[NSDate date] timeIntervalSinceDate:startInterval] - breakTime;

        // Update total earned
        secRate = rate.value / 60 / 60;
        total = secRate * seconds;
        [totalLabel setTitle:[NSString stringWithFormat:@"%@%.4f",sym,total] forState:UIControlStateNormal];

        days = seconds / (60 * 60 * 24);
        seconds -= days * (60 * 60 * 24);
        int hours = seconds / (60 * 60);
        fhours = (float)seconds / (60.0 * 60.0);
        seconds -= hours * (60 * 60);
        int minutes = seconds / 60;
        seconds -= minutes * 60;

        // Update the timer clock
        [elapsed setTitle:[NSString stringWithFormat:@"%.2i:%.2i:%.2i:%.2i",days,hours,minutes,seconds] forState:UIControlStateNormal];
    }
}

Answer 1

将按钮类型设置为UIButtonTypeCustom，它将停止闪烁