Ios UIView函数错误

Ios UIView函数错误,ios,swift,Ios,Swift,我试图创建一个UIView函数,调用该函数时将返回一个带有2个按钮的视图,在某些StackView中是一个TextView。我遇到了麻烦,目前它返回的只是一个空矩形(里面没有显示任何信息)。我做错了什么 func returnView(text1: String, text2: String) -> UIView { let customView = UIView() let firstButton = UIButton() let secondButton = UIButton() l

我试图创建一个UIView函数,调用该函数时将返回一个带有2个按钮的视图,在某些StackView中是一个TextView。我遇到了麻烦,目前它返回的只是一个空矩形(里面没有显示任何信息)。我做错了什么

func returnView(text1: String, text2: String) -> UIView {

let customView = UIView()
let firstButton = UIButton()
let secondButton = UIButton()
let textView = UITextView()

customView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: 90)
customView.backgroundColor = UIColor(red:0.82, green:0.83, blue:0.85, alpha:1.0)

firstButton.setTitle(text1, for: .normal)
firstButton.setTitleColor(UIColor(red:0.00, green:0.48, blue:1.00, alpha:1.0), for: .normal)
firstButton.titleLabel?.font = UIFont.systemFont(ofSize: 15, weight: UIFont.Weight.medium)

secondButton.setTitle("apple", for: .normal)
secondButton.setTitleColor(UIColor(red:0.00, green:0.48, blue:1.00, alpha:1.0), for: .normal)
secondButton.titleLabel?.font = UIFont.systemFont(ofSize: 15, weight: UIFont.Weight.medium)

textView.text = text2

let stack1 = UIStackView()
stack1.axis = .horizontal
stack1.alignment = .fill 
stack1.distribution = .fillEqually 

stack1.addArrangedSubview(firstButton)
stack1.addArrangedSubview(secondButton)

let stack2 = UIStackView()
stack2.axis = .horizontal
stack2.alignment = .fill 
stack2.distribution = .fillEqually

stack2.addArrangedSubview(textView)

let fullStack = UIStackView()
fullStack.axis = .vertical
fullStack.alignment = .fill
fullStack.distribution = .fillEqually
fullStack.addArrangedSubview(stack1)
fullStack.addArrangedSubview(stack2)

customView.addSubview(fullStack)

stack1.translatesAutoresizingMaskIntoConstraints = false
stack2.translatesAutoresizingMaskIntoConstraints = false
fullStack.translatesAutoresizingMaskIntoConstraints = false

NSLayoutConstraint.activate([fullStack.topAnchor.constraint(equalTo: customView.topAnchor), fullStack.leftAnchor.constraint(equalTo: customView.leftAnchor), fullStack.rightAnchor.constraint(equalTo: customView.rightAnchor), fullStack.heightAnchor.constraint(equalTo: customView.heightAnchor), (fullStack.centerXAnchor.constraint(equalTo: customView.centerXAnchor))])

return customView
}
编辑我通过此函数调用它:

func renderAttachment() {

    let view = returnView(text1: "test1", text2: "test2")

    // Render Image
    let renderer = UIGraphicsImageRenderer(size: view.frame.size)
    let image = renderer.image {
        view.layer.render(in: $0.cgContext)
    }

    // Create Attachment
    let attachment = NSTextAttachment()
    attachment.image = image
    attachment.bounds = CGRect(origin: .zero, size: image.size)

    // Current Attributed String
    let atStr = NSMutableAttributedString(attributedString: textview.attributedText)

    // Insert Attachment
    let attachmentAtStr = NSAttributedString(attachment: attachment)
    if let selectedRange = textview.selectedTextRange {
        let cursorIndex = textview.offset(from: textview.beginningOfDocument, to: selectedRange.start)
        atStr.insert(attachmentAtStr, at: cursorIndex)
        atStr.addAttributes(self.textview.typingAttributes, range: NSRange(location: cursorIndex, length: 1))
    } else {
        atStr.append(attachmentAtStr)
    }
    textview.attributedText = atStr
    print(atStr)
}

这就是它在我的文本视图(只是一个空框!)中的显示方式。

我尝试使用您的函数添加一个视图,效果非常好。请看下面的截图

在self.returnView(text1:“Test1”,text2:“Test2”)函数调用后添加以下代码行

view.layoutIfNeeded()

希望这能有所帮助。

我尝试使用您的函数添加一个视图,效果非常好。请看下面的截图

在self.returnView(text1:“Test1”,text2:“Test2”)函数调用后添加以下代码行

view.layoutIfNeeded()

希望这有帮助。

您正在渲染一个尚未添加到视图层次结构的视图,因此需要通过调用
视图触发布局。layoutIfNeeded()


您正在呈现尚未添加到视图层次结构中的视图,因此需要通过调用
view.layoutifneed()
,触发布局:


我将您的函数添加到一个新项目中,并将
view.addSubview(returnView(text1:“Hello World!”,text2:“Foo Bar Baz”)
添加到
viewDidLoad()
中,您的视图确实显示了内容。请注意,您的框架将视图放置在屏幕左上角的iPhone X的标题栏和凹口后面。我将您的函数添加到一个新项目中,并添加了
view.addSubview(returnView(text1:“Hello World!”,text2:“Foo bar Baz”)
viewDidLoad()
,您的视图确实显示了内容。请注意,您的框架将视图放置在屏幕左上角的标题栏和iPhone X的凹口后面。添加了包含更多信息的编辑,告诉我您的想法?添加了包含更多信息的编辑,告诉我您的想法?