UIViewAnimationOptions错误从Swift 1迁移到Swift 2

Question

我刚刚将Xcode更新为7.0.1，因此也将Swift从Swift 1更新为 斯威夫特2.

更新完成后我遇到了很多错误，这是我无法修复的问题之一。如果你能为我解决这个问题真的很好。

错误消息显示：

  

Nil与预期类型UIViewAnimationOption'

不兼容

UIView.animateWithDuration(2, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 6, options: nil, animations: ({

}), completion: nil)

Answer 1

使用UIViewAnimationOptions

的options:属性对象

UIView.animateWithDuration(2, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 6, options: UIViewAnimationOptions.CurveEaseInOut, animations: { () -> Void in

}, completion: nil)

Answer 2

您可以这样使用：

UIView.animateWithDuration(0, delay: 0, usingSpringWithDamping: 0, initialSpringVelocity: 0, options: UIViewAnimationOptions.CurveEaseInOut, animations: { () -> Void in

        }) { (finished: Bool) -> Void in

    }

或

UIView.animateWithDuration(0, delay: 0, usingSpringWithDamping: 0, initialSpringVelocity: 0, options: [UIViewAnimationOptions.CurveEaseInOut, UIViewAnimationOptions.Autoreverse], animations: { () -> Void in

        }, completion: nil)

Answer 3

在Swift 2中，UIViewAnimationOption被声明为非可选。因此它不能是nil。等效于无选项是通用初始化程序

... options: UIViewAnimationOption() ...

或一对空括号

... options: [] ...