标签显示屏幕顶部而不是在 inputAccessoryView-移动开发问题

label showing top of screen instead of being on the inputAccessoryView(标签显示屏幕顶部而不是在 inputAccessoryView)

本文介绍了标签显示屏幕顶部而不是在 inputAccessoryView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

这是我的代码:

 var messageView : UITextView = {
        var textView = UITextView()
        textView.text = "   Add your message here"
        textView.textColor = UIColor.lightGrayColor()
        textView.translatesAutoresizingMaskIntoConstraints = false
        textView.backgroundColor = UIColor.lightGrayColor()
        textView.layer.cornerRadius = 3
        textView.clipsToBounds = true
        textView.keyboardAppearance = .Dark
        textView.layer.borderWidth = 1.0
        textView.layer.borderColor = UIColor.lightGrayColor()
        textView.autocorrectionType = .no


        // MARK: Setup accesorryView

        let label = UILabel()
        label.text = "You have a 100 character limit"
        label.translatesAutoresizingMaskIntoConstraints = false

        let accessoryView = UIView(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, 44))
        accessoryView.backgroundColor = UIColor.redColor()

        accessoryView.addSubview(label)

        accessoryView.leadingAnchor.constraintEqualToAnchor(label.leadingAnchor, constant: 18)
        accessoryView.centerYAnchor.constraintEqualToAnchor(label.centerYAnchor)

        textView.inputAccessoryView = accessoryView

        return textView
    }()

我正在尝试将 inputAccessoryView 添加到我的 TextView 的键盘.我的 inputAccessoryView 必须有一个标签说你有 100 个字符的限制"...

I'm trying to add an inputAccessoryView to my TextView's keyboard. My inputAccessoryView must have a label saying "You have a 100 character limit"...

但我目前的结果是:

蓝色的文本...正是我想要在 inputAccessoryView 中出现的标签，但它在我的屏幕顶部...

The text in the blue...is exactly the label I want to be in the inputAccessoryView, but it's on the top of my screen...

推荐答案

需要将标签上的translatesAutoresizingMaskIntoConstraints设置为false和isActive到 true 上的约束.基本上你的约束代码应该是这样的:

You need to set translatesAutoresizingMaskIntoConstraints on the label to false and isActive to true on the constraints. Basically your constrains code should look like this:

accessoryView.leadingAnchor.constraintEqualToAnchor(label.leadingAnchor, constant: 18).isActive = true
accessoryView.centerYAnchor.constraintEqualToAnchor(label.centerYAnchor).isActive = true

这篇关于标签显示屏幕顶部而不是在 inputAccessoryView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！

问题描述

推荐答案

基础教程推荐