迅速操场UITextField生成太大的键盘 [英] swift playground UITextField spawns keyboard that is too big

问题描述

在Mac OS上的操场上快速移动.当用户单击UItextfield时，会生成一个键盘，但是与视图相比，它很大，并且只有前几个键可用.

Swift in playground on Mac OS. When the user clicks in a UItextfield, a keyboard spawns but it is very large compared to the view and only the first few keys are available.

最小示例:

import UIKit
import PlaygroundSupport

class TesterViewController : UIViewController {
var testTextField : UITextField!
override func loadView() {
    let view = UIView()
    view.backgroundColor = .white

    testTextField = UITextField()
    testTextField.borderStyle = .roundedRect
    testTextField.text = ""
    view.addSubview(testTextField)
    testTextField.translatesAutoresizingMaskIntoConstraints = false

    NSLayoutConstraint.activate([
        testTextField.topAnchor.constraint(equalTo: view.topAnchor, constant: 20),
        testTextField.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
        ])

    self.view = view
    }
}
PlaygroundPage.current.liveView = TesterViewController()

屏幕截图

推荐答案

我遇到同样的问题.看来Playground的硬编码屏幕尺寸为768x1024(在Playground中运行UIScreen.main.bounds)，并根据该尺寸显示键盘，而与实时取景的实际尺寸无关.

I face the same issue. It seems as if Playground has a hard-coded screen size of 768x1024 (run UIScreen.main.bounds in the Playground) and shows the keyboard according to this size, independently of the live view's actual size.

我想出的最好的解决方法是增加视图控制器的大小，使其与键盘匹配:

The best workaround I came up with is to increase the size of the view controller so that it matches the keyboard:

let vc = TesterViewController()
vc.preferredContentSize = vc.view.frame.size // or a custom CGSize
PlaygroundPage.current.liveView = vc

当然，这会使视图变得比您想要的要大，因此，仅在确实需要访问屏幕键盘进行测试时，才使用此变通方法.

Of course this makes the view larger than you might want it to be, so I only use this workaround when I really have to access the on-screen keyboard for testing.

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