UIActivityIndicatorView的两种形式
2011-11-08 15:22
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UIActivityIndicatorView的两种形式
用法一:只显示不停旋转的进度滚轮指示器。
//显示进度滚轮指示器
-(void)showWaiting {
progressInd=[[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:
UIActivityIndicatorViewStyleWhiteLarge];
progressInd.center=CGPointMake(self.view.center.x,240);
[self.navigationController.view addSubview:progressInd];
[progressInd startAnimating];
}
//消除滚动轮指示器
-(void)hideWaiting
{
[progressInd stopAnimating];
}
用法二:带有半透明背景的进度轮指示器。
//显示进度滚轮指示器
-(void)showWaiting:(UIView *)parent {
int width = 32, height = 32;
CGRect frame
= CGRectMake(100, 200, 110, 70)
;//[parent frame]; //[[UIScreen mainScreen] applicationFrame];
int x = frame.size.width;
int y = frame.size.height;
frame = CGRectMake((x - width) / 2, (y - height)
/ 2, width, height);
UIActivityIndicatorView* progressInd =
[[UIActivityIndicatorView alloc]initWithFrame:frame];
[progressInd startAnimating];
progressInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;
frame = CGRectMake((x - 70)/2,
(y - height) / 2 + height, 80, 20);
UILabel *waitingLable = [[UILabel alloc] initWithFrame:frame];
waitingLable.text = @"Loading...";
waitingLable.textColor = [UIColor whiteColor];
waitingLable.font = [UIFont systemFontOfSize:15];
waitingLable.backgroundColor = [UIColor clearColor];
frame = CGRectMake(100, 200, 110, 70)
;//[parent frame];
UIView *theView = [[UIView alloc] initWithFrame:frame];
theView.backgroundColor = [UIColor blackColor];
theView.alpha = 0.7;
[theView addSubview:progressInd];
[theView addSubview:waitingLable];
[progressInd release];
[waitingLable release];
[theView setTag:9999];
[parent addSubview:theView];
[theView release];
}
//消除滚动轮指示器
-(void)hideWaiting
{
[[self.view viewWithTag:9999] removeFromSuperview];
}
另一种实现
UIActivityIndicatorView *activityView = [[[UIActivityIndicatorView
alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]
autorelease];
activityView.frame =
CGRectMake(139.0f-18.0f,
50.0f, 37.0f,
37.0f);
[self.loadingView
addSubview:activityView];
[activityView
startAnimating];
activityView.center =
self.loadingView.center;
[activityView stopAnimating];
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