在ios7中,我的UIButton标题在错误的时间动画进出——迟到。在iOS 6上不出现此问题。我用的是:

[self setTitle:text forState:UIControlStateNormal];

我更希望这能立即发生,而不是一个空白的框架。这种眨眼特别分散注意力,并将注意力从其他动画中转移开。


当前回答

将按钮类型设置为UIButtonTypeCustom,它将停止闪烁

其他回答

这适用于自定义按钮:

[UIView setAnimationsEnabled:NO];
[_button setTitle:@"title" forState:UIControlStateNormal];
[UIView setAnimationsEnabled:YES];

对于系统按钮,你需要在重新启用动画之前添加这个(谢谢@Klaas):

[_button layoutIfNeeded];

将按钮类型设置为UIButtonTypeCustom,它将停止闪烁

Xhacker Liu扩展转换为Swift 3:

extension UIButton {
    func setTitleWithoutAnimation(title: String?) {
        UIView.setAnimationsEnabled(false)

        setTitle(title, for: .normal)

        layoutIfNeeded()
        UIView.setAnimationsEnabled(true)
    }
}

我已经做了一个Swift扩展来做这个:

extension UIButton {
    func setTitleWithoutAnimation(title: String?) {
        UIView.setAnimationsEnabled(false)

        setTitle(title, forState: .Normal)

        layoutIfNeeded()
        UIView.setAnimationsEnabled(true)
    }
}

适用于我的iOS 8和9,与UIButtonTypeSystem。

(代码是Swift 2, Swift 3和Objective-C应该类似)

你实际上可以在动画块之外设置标题,只是要确保在performWithoutAnimation中调用layoutIfNeeded():

button1.setTitle("abc", forState: .Normal)
button2.setTitle("abc", forState: .Normal)
button3.setTitle("abc", forState: .Normal)
UIView.performWithoutAnimation {
    self.button1.layoutIfNeeded()
    self.button2.layoutIfNeeded()
    self.button3.layoutIfNeeded()
}

如果你有一堆按钮,考虑在超视图上调用layoutIfNeeded():

button1.setTitle("abc", forState: .Normal)
button2.setTitle("abc", forState: .Normal)
button3.setTitle("abc", forState: .Normal)
UIView.performWithoutAnimation {
    self.view.layoutIfNeeded()
}