Swift

Question

在我的项目中，我有一个名为 MakeWishView 的 UIView，我通过点击这样的按钮让其出现：

@objc private func addWishButtonTapped(){
    print("addWishButton tapped")
    
    view.addSubview(makeWishView)
    
    makeWishView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
    makeWishView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
    makeWishView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
    makeWishView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
    
    makeWishView.grayView.transform =  CGAffineTransform(scaleX: 1.3, y: 1.3)
    makeWishView.visualEffectView.alpha = 0
    makeWishView.grayView.alpha = 0
    makeWishView.wishButton.alpha = 0
    makeWishView.closeButton.alpha = 0
    makeWishView.dropDownButton.alpha = 0
    makeWishView.wishNameTextField.alpha = 0
    makeWishView.wishImage.alpha = 0
    makeWishView.wishImageButton.alpha = 0
    makeWishView.linkTextField.alpha = 0
    makeWishView.priceTextField.alpha = 0
    makeWishView.noteTextField.alpha = 0
    makeWishView.linkImage.alpha = 0
    makeWishView.priceImage.alpha = 0
    makeWishView.noteImage.alpha = 0
    
        
    UIView.animate(withDuration: 0.3) {
        
        self.makeWishView.visualEffectView.alpha = 1
        self.makeWishView.grayView.alpha = 1
        self.makeWishView.wishButton.alpha = 1
        self.makeWishView.closeButton.alpha = 1
        self.makeWishView.dropDownButton.alpha = 1
        self.makeWishView.wishNameTextField.alpha = 1
        self.makeWishView.wishImage.alpha = 1
        self.makeWishView.wishImageButton.alpha = 1
        self.makeWishView.linkTextField.alpha = 1
        self.makeWishView.priceTextField.alpha = 1
        self.makeWishView.noteTextField.alpha = 1
        self.makeWishView.linkImage.alpha = 1
        self.makeWishView.priceImage.alpha = 1
        self.makeWishView.noteImage.alpha = 1
        
        self.makeWishView.grayView.transform = CGAffineTransform.identity
    }
    
}

我驳斥这样的观点：

func dismissView(){
    UIView.animate(withDuration: 0.3, animations: {
        self.grayView.transform =  CGAffineTransform(scaleX: 1.3, y: 1.3)
        self.visualEffectView.alpha = 0
        self.grayView.alpha = 0
        self.wishButton.alpha = 0
        self.closeButton.alpha = 0
        self.dropDownButton.alpha = 0
        self.wishNameTextField.alpha = 0
        self.wishImage.alpha = 0
        self.wishImageButton.alpha = 0
        self.linkTextField.alpha = 0
        self.priceTextField.alpha = 0
        self.noteTextField.alpha = 0
        self.linkImage.alpha = 0
        self.priceImage.alpha = 0
        self.noteImage.alpha = 0
    }) { (_) in
        self.visualEffectView.removeFromSuperview()
        self.grayView.removeFromSuperview()
        self.wishButton.removeFromSuperview()
        self.closeButton.removeFromSuperview()
        self.dropDownButton.removeFromSuperview()
        self.wishNameTextField.removeFromSuperview()
        self.wishImage.removeFromSuperview()
        self.wishImageButton.removeFromSuperview()
        self.linkTextField.removeFromSuperview()
        self.priceTextField.removeFromSuperview()
        self.noteTextField.removeFromSuperview()
        self.linkImage.removeFromSuperview()
        self.priceImage.removeFromSuperview()
        self.noteImage.removeFromSuperview()
        self.removeFromSuperview()
    }
}

问题是，如果我想再次点击 addWishButton，MakeWishView 不会显示，而是一个空的 view:

我想我对如何关闭或添加 UIView 有一个简单的误解。感谢任何帮助:)

Answer 1

你删除这里的子视图

    self.visualEffectView.removeFromSuperview()
    self.grayView.removeFromSuperview()
    self.wishButton.removeFromSuperview()
    self.closeButton.removeFromSuperview()
    self.dropDownButton.removeFromSuperview()
    self.wishNameTextField.removeFromSuperview()
    self.wishImage.removeFromSuperview()
    self.wishImageButton.removeFromSuperview()
    self.linkTextField.removeFromSuperview()
    self.priceTextField.removeFromSuperview()
    self.noteTextField.removeFromSuperview()
    self.linkImage.removeFromSuperview()
    self.priceImage.removeFromSuperview()
    self.noteImage.removeFromSuperview()
    self.removeFromSuperview()

您需要将视图声明为计算的属性而不是像

这样的存储的

var makeWishView:MakeWishView {
     ....
    return 
}

或仅在动画完成时执行此操作

 self.removeFromSuperView()

并向后设置 alpha = 1

Answer 2

为什么要从他们的超级视图中删除以下视图？没看到你又加了

{ (_) in
    self.visualEffectView.removeFromSuperview()
    self.grayView.removeFromSuperview()
    self.wishButton.removeFromSuperview()
    self.closeButton.removeFromSuperview()
    self.dropDownButton.removeFromSuperview()
    self.wishNameTextField.removeFromSuperview()
    self.wishImage.removeFromSuperview()
    self.wishImageButton.removeFromSuperview()
    self.linkTextField.removeFromSuperview()
    self.priceTextField.removeFromSuperview()
    self.noteTextField.removeFromSuperview()
    self.linkImage.removeFromSuperview()
    self.priceImage.removeFromSuperview()
    self.noteImage.removeFromSuperview()
    self.removeFromSuperview()
}

我认为您只需要调用以下代码即可：

{ (_) in

    self.removeFromSuperview()

}

Swift - remove/add 来自 superView 的 UIView

Swift - remove/add UIView from superView

uiview

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