UIActivityIndi​​catorView爲加載一個URL的UIImage

Question

我有一個UIImage從一個URL加載，我想顯示一個UIActivityIndicatorView動畫，而圖像加載。有人可以幫助我嗎？

謝謝大家。

Answer 1

所以你想在訪問服務器時使用UIActivityIndicator。

首先創建，而連接呼叫指示燈，當連接didfinishloading除去活動的指標

所有的

//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; 
} 

Answer 2

首先添加活動指示燈在廈門國際銀行和連接UIActivity指標的對象。

在xib中單擊「停止時隱藏」。

然後，

-(void)FetchFromServer 

{ 

NSURLRequest* updateRequest = [NSURLRequest requestWithURL: [NSURL URLWithString:@"Write Your Url Here"]]; 

NSURLConnection* connection = [[NSURLConnection alloc] initWithRequest:updateRequest delegate:self]; 

[connection start]; 

[activityIndicator startAnimating]; 

} 

然後在委託

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{ 

UIImage *img = [UIImage imageWithData: data]; 

myImageView.image=img; 

[activityIndicator stopAnimating]; 

}