xcode 为 URL 加载的 UIImage 的 UIActivityIndicatorView
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UIActivityIndicatorView for an UIImage that load for an URL
提问by Alberto Juarez
I have an UIImagethat is loaded from a URL, and i want to show an UIActivityIndicatorViewanimating while the image loads. Someone can help me?
我有一个UIImage从 URL 加载的，我想UIActivityIndicatorView在加载图像时显示动画。有人可以帮助我吗？
Thanks for all.
谢谢大家。
回答by Sri
So u want to use the UIActivityIndicatorwhile accessing the server.
所以你想UIActivityIndicator在访问服务器时使用。
First create the indicator while the connection call, and when connection didfinishloading remove the activity indicator
首先在连接调用时创建指示器，并在连接didfinishloading时移除活动指示器
//call this when connection start
UIActivityIndicator *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
activityIndicator.frame = CGRectMake(140, 236, 37, 37);
[activityIndicator startAnimating];
[self.view addSubview:activityIndicator];
self.view.userInteractionEnabled = NO;
//remove activity indicator while connection did finish loadin
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[activityIndicator stopAnimating];
[activityIndicator removeFromSuperview];
self.view.userInteractionEnabled = YES;
}
回答by Hardik Shah
First of all add Activity indicator in xib and connect object of the UIActivity Indicator.
首先在xib中添加Activity指标并连接UIActivity指标的对象。
Click "Hides when Stopped" in the xib.
单击 xib 中的“停止时隐藏”。
Then,
然后，
-(void)FetchFromServer
{
NSURLRequest* updateRequest = [NSURLRequest requestWithURL: [NSURL URLWithString:@"Write Your Url Here"]];
NSURLConnection* connection = [[NSURLConnection alloc] initWithRequest:updateRequest delegate:self];
[connection start];
[activityIndicator startAnimating];
}
And then in the delegate,
然后在代表中，
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
UIImage *img = [UIImage imageWithData: data];
myImageView.image=img;
[activityIndicator stopAnimating];
}
