PopoverPresentation Controller 未显示在屏幕中央，左上箭头方向 [英] PopoverPresentation Controller not displaying on centre of the screen with the top left arrow direction

问题描述

我想在屏幕中央显示弹出窗口.下图显示它正在移动左侧的位.

I want to display pop up in a centre of the screen. The below image displaying it's moving the bit of left side.

我尝试了以下代码来显示弹出框控制器.

I have tried below code to display popover controller.

func displayPopoverVC() {

    let popOver = popupArtistStoryboard.instantiateViewController(withIdentifier: "MeasurementPopupVC") as! MeasurementPopupVC
    popOver.modalPresentationStyle = .popover
    popOver.popoverPresentationController?.permittedArrowDirections = .up

    popOver.popoverPresentationController?.sourceView = btnTmpMeasurement
    popOver.popoverPresentationController?.sourceRect = CGRect.init(x: 0, y: 0, width: btnTmpMeasurement.frame.size.width, height: btnTmpMeasurement.frame.size.height)

    if (DeviceType.IS_IPAD_PRO || DeviceType.IS_IPAD) {
        popOver.preferredContentSize = CGSize(width: 240, height: 50.0)
    } else {
        popOver.preferredContentSize = CGSize(width: 325, height: 30.0)
    }

    popOver.delegate = self
    popOver.popoverPresentationController?.delegate = self

    popOver.arrOfMeasurementData = [String]()

    if let presentation = popOver.popoverPresentationController {
        presentation.backgroundColor = UIColor(red: 236.0/255.0, green: 236.0/255.0, blue: 236.0/255.0, alpha: 0.5)
    }

    self.present(popOver, animated: true) {}
}

如果我写了任何错误的代码，请纠正我.

Please correct me if I've written any incorrect code.

推荐答案

用户下面的代码可以在屏幕中央设置弹出框.

User below code to set popover in the center of screen.

popOver.popoverPresentationController?.sourceRect = CGRect.init(x: 0, y: 0, width: btnTmpMeasurement.frame.size.width, height: btnTmpMeasurement.frame.size.height)
popOver.center = CGPoint(x: UIScreen.main.bounds.maxX, y: UIScreen.main.bounds.midY)

这将在垂直和水平方向的中心设置弹出框.您可以定义 y 点硬编码，如:-

This will set popover in center for both vertically and horizontally. You can define y point hardcoded like:-

popOver.popoverPresentationController?.sourceRect = CGRect.init(x: 0, y: 0, width: btnTmpMeasurement.frame.size.width, height: btnTmpMeasurement.frame.size.height)
popOver.center = CGPoint(x: UIScreen.main.bounds.maxX, y: 100.0)

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