ios - 没有更多上下文的动画选项不明确

Question

我创建了一个隐藏函数，它隐藏了一个特定的 View 。但是我不断收到以下错误:“没有更多上下文，表达式类型不明确”。我需要提供什么样的更多上下文？

func hide(toFrame:CGRect, delay:NSTimeInterval) {

    UIView.animateWithDuration(animationSettings.duration,
        delay: delay,
        usingSpringWithDamping: animationSettings.damping,
        initialSpringVelocity: animationSettings.velocity,
        options: (.BeginFromCurrentState | .AllowUserInteraction),
        animations:{
            self.frame = self.offScreenFrame
        }, completion: {
            (value: Bool) in
            self.delegate!.didNotifyFinishedAnimation(true)
            self.canNotify = true
        }
    )
}

Answer 1

UIViewAnimationOptions 是 OptionSetType 可以设置语法来定义选项。因此，需要将上述代码的选项从 (.BeginFromCurrentState | .AllowUserInteraction) 更改为 [.BeginFromCurrentState, .AllowUserInteraction]。

UIView.animateWithDuration(animationSettings.duration,
    delay: delay,
    usingSpringWithDamping: animationSettings.damping,
    initialSpringVelocity: animationSettings.velocity,
    options: [.BeginFromCurrentState, .AllowUserInteraction],
    animations:{
        self.frame = self.offScreenFrame
    }, completion: {
        (value: Bool) in
        self.delegate!.didNotifyFinishedAnimation(true)
        self.canNotify = true
    }
)