iOS - 默认事件加载器，如 "please wait"

Question

我想在调用 API 或任何后台方法时在 uiview 中添加一个加载程序。它有任何默认值吗？或者我创建了自定义加载程序。

Answer 1

试试这个:

-(void)loaderType1 :(UIView *)View
{
    UIActivityIndicatorView *activityView = [[UIActivityIndicatorView alloc]
                                             initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

    activityView.center=View.center;
    activityView.color=(UIColor*)[UIColor blackColor]; //change color
    activityView.tag=10;
    [activityView startAnimating];
    //this is for freeze UI when loader appears
    //[[UIApplication sharedApplication] beginIgnoringInteractionEvents];      
    //this is for stop the previous action
    //[[UIApplication sharedApplication] endIgnoringInteractionEvents];
    [View addSubview:activityView];
    [View bringSubviewToFront:activityView];
}

现在在任何地方都这样调用它 -

[self loaderType1: self.view];

删除加载程序:

 if ([self.view viewWithTag:10])
 {
   [[self.view viewWithTag:10] removeFromSuperview];
 }