如何在视图控制器中显示加载指示器.
我在viewDidLoad()中使用Alamofire ….
Alamofire.request(.GET,formURL,parameters: nil)
.responseJSON { (request,response,jsonResult,error) in
}
解决方法
有多种方法可以做到这一点但是如果你在视图控制器中调用Alamofire,你可以将这些属性添加到类中：
var spinner = UIActivityIndicatorView(activityIndicatorStyle: .WhiteLarge) var loadingView: UIView = UIView()
并添加两个帮助程序,您应该自定义适合您应用程序中的任何内容：
func showActivityIndicator() {
dispatch_async(dispatch_get_main_queue()) {
self.loadingView = UIView()
self.loadingView.frame = CGRect(x: 0.0,y: 0.0,width: 100.0,height: 100.0)
self.loadingView.center = self.view.center
self.loadingView.backgroundColor = UIColor(rgba: "#444444")
self.loadingView.alpha = 0.7
self.loadingView.clipsToBounds = true
self.loadingView.layer.cornerRadius = 10
self.spinner = UIActivityIndicatorView(activityIndicatorStyle: .WhiteLarge)
self.spinner.frame = CGRect(x: 0.0,width: 80.0,height: 80.0)
self.spinner.center = CGPoint(x:self.loadingView.bounds.size.width / 2,y:self.loadingView.bounds.size.height / 2)
self.loadingView.addSubview(self.spinner)
self.view.addSubview(self.loadingView)
self.spinner.startAnimating()
}
}
func hideActivityIndicator() {
dispatch_async(dispatch_get_main_queue()) {
self.spinner.stopAnimating()
self.loadingView.removeFromSuperview()
}
}
并在需要时调用它,例如：
showActivityIndicator()
Alamofire.request(.GET,error) in
self.hideActivityIndicator()
}
