UIAccessibility.convertToScreenCoordinates() 总是 return 一个 CGRect(0,0,0,0)

Question

我正在尝试增加自定义 UIView() 中按钮的命中目标，该自定义 UIView() 是另一个父视图的子视图。我使用 convertToScreenCoordinates() 来尝试实现这一点。下面是一个例子

let rect2 = CGRect(x: 25, y: 21, width: 200, height: 44)
let newRect = UIAccessibility.convertToScreenCoordinates(rect2, in: self)

其中 self 是自定义 UIView()
调试，我看到 newRect = CGRect(0,0,0,0)

因此

button.accessibilityFrame = newRect // Does not work as intended as VoiceOver frame is now size 0,0 and origin 0,0

Answer 1

我遇到了同样的问题。结果是我在定位视图之前设置了 accessibilityFrame 属性。我通过将此代码更改为自定义视图的 layoutSubviews 方法来修复它。

override func layoutSubviews() {
    super.layoutSubviews()

    let rect2 = CGRect(x: 25, y: 21, width: 200, height: 44)
    let newRect = UIAccessibility.convertToScreenCoordinates(rect2, in: self)
    button.accessibilityFrame = newRect
    }

UIAccessibility.convertToScreenCoordinates() 总是 return 一个 CGRect(0,0,0,0)

UIAccessibility.convertToScreenCoordinates() always return a CGRect(0,0,0,0)

ios

uiaccessibility

swift