具有系统类型的UIButton在setTitle(_:for:)上有隐式动画。你可以用两种方法来解决这个问题:

设置按钮类型为自定义，从代码或接口生成器:

let button = UIButton(type: .custom)

从代码中禁用动画:

UIView.performWithoutAnimation {
    button.setTitle(title, for: .normal)
    button.layoutIfNeeded()
}

也许生成2个动画和2个按钮是一个更好的解决方案，以避免出现动画和更改按钮文本的问题?

我创建了第二个uibutton并生成了2个动画，这个解决方案没有hickup。

    _button2.hidden = TRUE;
    _button1.hidden = FALSE;

    CGPoint startLocation = CGPointMake(_button1.center.x, button1.center.y - 70);
    CGPoint stopLocation  = CGPointMake(_button2.center.x, button2.center.y- 70);


    [UIView animateWithDuration:0.3 animations:^{ _button2.center = stopLocation;} completion:^(BOOL finished){_button2.center = stopLocation;}];
    [UIView animateWithDuration:0.3 animations:^{ _button1.center = startLocation;} completion:^(BOOL finished){_button1.center = startLocation;}];

从iOS 7.1开始，唯一适合我的解决方案是用UIButtonTypeCustom类型初始化按钮。

斯威夫特5

myButton.titleLabel?.text = "title"
myButton.setTitle("title", for: .normal)

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)
    }
}