在Swift中，你可以使用:

UIView.performWithoutAnimation {
    self.someButtonButton.setTitle(newTitle, forState: .normal)
    self.someButtonButton.layoutIfNeeded()
}

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()
}

使用performWithoutAnimation:方法，然后强制布局立即发生，而不是稍后。

[UIView performWithoutAnimation:^{
  [self.myButton setTitle:text forState:UIControlStateNormal];
  [self.myButton layoutIfNeeded];
}];

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)

设置UIButton类型为自定义。这应该会删除淡入和淡出动画。

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];