UIActivityIndi​​catorView为加载一个URL的UIImage

Question

我有一个UIImage从一个URL加载，我想显示一个UIActivityIndicatorView动画，而图像加载。有人可以帮助我吗？

谢谢大家。

Answer 1

所以你想在访问服务器时使用UIActivityIndicator。

首先创建，而连接呼叫指示灯，当连接didfinishloading除去活动的指标

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

首先添加活动指示灯在厦门国际银行和连接UIActivity指标的对象。

在xib中单击“停止时隐藏”。

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]; 

} 

然后在委托

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

UIImage *img = [UIImage imageWithData: data]; 

myImageView.image=img; 

[activityIndicator stopAnimating]; 

}