IOS 登陆加载数据 UIActivityIndicatorView

 UIActivityIndicatorView     *_aiView;          //用来加载动画
    UIButton                    *_clickMask;       //button


//加载动画
-(void)loginAnimationActivityIndicatorView
{
    _clickMask = [UIButton buttonWithType:UIButtonTypeCustom];
    [_clickMask setFrame:[UIScreen mainScreen].bounds];
    [self.view addSubview:_clickMask];
    [_clickMask setHidden:YES];//隐藏按钮
    
    
    _aiView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
    //[aiView setBackgroundColor:[UIColor grayColor]];
    _aiView.frame = CGRectMake([UIScreen mainScreen].bounds.size.width/2 - 45/2, [UIScreen mainScreen].bounds.size.height/2 - 45/2+120, 45, 45);
    _aiView.hidesWhenStopped = YES;
    [self.view addSubview:[_aiView autorelease]];
    [_aiView stopAnimating];
}

//是否隐藏AnimationActivityIndicatorView
-(void)waitView:(BOOL)want2Show
{
    if (want2Show) {
        [self.view bringSubviewToFront:_clickMask];
        [self.view bringSubviewToFront:_aiView];
        [_clickMask setHidden:NO];
        [_aiView startAnimating];
    }else {
        [_clickMask setHidden:YES];
        [_aiView stopAnimating];
    }
}