swift run循环'NSFastEnumerationIterator.Element'（又名'Any'）不能转换为'UIView'

Question

var _buttons : NSMutableArray = []
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {


    let location : CGPoint = gestureRecognizer.location(in: self)
    for subviews : UIView in _buttons {
        if subviews.frame.contains(location) {
            return false
        }
    }

    return true
}

我这样做但是它出现了错误'NSFastEnumerationIterator.Element' (aka 'Any') is not convertible to 'UIView'

我尝试将for subviews : UIView in _buttons替换为for subviews : UIView in _buttons as [AnyObject]，但它不起作用。

我该怎么办？

Answer 1

您需要将自己的收藏集声明为var buttons: [UIView]，以确保其仅包含UIView s