ios - 事件指示器未在 TableView 中居中

Question

我想用 NIB/XIB 文件在 TableView 中显示 activity indicator，但它显示的不是在中心，而是放在右侧

我愿意:

override func viewDidLoad() {
    super.viewDidLoad()

let actInd: UIActivityIndicatorView = UIActivityIndicatorView()
    actInd.frame = CGRect(x: 0.0, y: 0.0, width: 40.0, height: 40.0)
    actInd.center = self.view.center
    actInd.hidesWhenStopped = true
    actInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.whiteLarge
    self.view.addSubview(actInd)
    actInd.startAnimating()
}

Answer 1

这种方法适合我。

    if let window = UIApplication.shared.keyWindow { 
        activityIndicator.frame = CGRect(x: window.frame.width/2, y: window.frame.height/2, width: 0, height: 0)
        activityIndicator.hidesWhenStopped = true
        activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.white

        window.addSubview(activityIndicator)
    }

希望对您有所帮助:)