tell user the status

+(UIView *)waitingView
{
    CGRect frame = CGRectMake(90, 190, 32, 32);
    UIActivityIndicatorView* progressInd = [[UIActivityIndicatorView alloc] initWithFrame:frame];
    [progressInd startAnimating];
    progressInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;
 
    frame = CGRectMake(130, 193, 140, 30);
    UILabel *waitingLable = [[UILabel alloc] initWithFrame:frame];
    waitingLable.text = @"Processing...";
    waitingLable.textColor = [UIColor whiteColor];
    waitingLable.font = [UIFont systemFontOfSize:20];;
    waitingLable.backgroundColor = [UIColor clearColor];
 
    frame = [[UIScreen mainScreen] applicationFrame];
    UIView *theView = [[UIView alloc] initWithFrame:frame];
    theView.backgroundColor = [UIColor blackColor];
    theView.alpha = 0.7;
    [theView addSubview:progressInd];
    [theView addSubview:waitingLable];
 
    [progressInd release];
    [waitingLable release];
 
    return [theView autorelease];
}

 

 

The most basic code is here:

最简单的就是显示一个什么也没有的view，如下

CGRect frame = [[UIScreen mainScreen] applicationFrame];//获取窗口大小

UIView *theView = [[UIView alloc] initWithFrame:frame];//实例一个UIView

theView.backgroundColor = [UIColor blackColor];//设置其背景色为黑色

theView.alpha = 0.7;//设置其透明为0.7


然后想办法显示这个theView即可，比如

[[[UIApplication sharedApplication] keyWindow] addSubview:theView]