[英]How to grow a popover controller
我的應用程序中有一個彈出框 controller 用於 iPad 和 Mac(使用 mac 催化劑),我試圖弄清楚如何在彈出框已經顯示時增加它的高度。 我一直在到處尋找如何做到這一點,但我發現的一切都是關於在展示之前而不是之后設置尺寸。
彈出窗口顯示時,其中有一個按鈕應該將高度增加 100-150 像素,但我不知道如何
誰能幫我解決這個問題? 先感謝您!
這是我的彈出窗口呈現代碼:
func openView(sourceView: UIView?, sourceRect: CGRect?) {
let vc = ViewControllerA()
//Try popover
if let sourceView = sourceView,
let sourceRect = sourceRect {
vc.modalPresentationStyle = .popover
if let popover = vc.popoverPresentationController {
vc.preferredContentSize = return CGSize(width: 390, height: 390)
vc.presentationController?.delegate = self
popover.sourceView = sourceView
popover.sourceRect = sourceRect
popover.permittedArrowDirections = [.up, .left]
self.present(vc, animated: true, completion: nil)
return
}
}
//present it normally if there's no source view
vc.modalPresentationStyle = .overCurrentContext
vc.modalTransitionStyle = .crossDissolve
self.present(vc, animated: true, completion: nil)
}
要在彈出視圖中更改顯示的 controller 的大小,您應該修改其preferredContentSize
屬性:
@IBAction func showPopover(_ sender: UIButton) {
// Create controller
guard let controller = storyboard?.instantiateViewController(withIdentifier: "Popover") else {
return
}
controller.modalPresentationStyle = .popover
controller.preferredContentSize = CGSize(width: 200, height: 200)
// Configure popover
guard let popover = controller.popoverPresentationController else {
return
}
popover.permittedArrowDirections = .up
popover.sourceView = self.view
popover.sourceRect = sender.frame
popover.delegate = self
present(controller, animated: true, completion: nil)
// Change height after 3 secs
DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
controller.preferredContentSize = CGSize(width: 200, height: 400)
}
}
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