UIActivityIndicatorView 用于为 URL 加载的 UIImage

发布于 2024-12-21 15:33:42 字数 121 浏览 0 评论 0原文

我有一个从 URL 加载的 UIImage ，我想在加载图像时显示一个 UIActivityIndicatorView 动画。有人可以帮助我吗？

谢谢大家。

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呆 2024-12-28 15:33:42

所以你想在访问服务器时使用UIActivityIndicator。

首先在连接调用时创建指示器，然后在连接完成加载时删除活动指示器

//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;
}

So u want to use the UIActivityIndicator while accessing the server.

First create the indicator while the connection call, and when connection didfinishloading remove the activity indicator

//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;
}

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超可爱的懒熊 2024-12-28 15:33:42

首先在 xib 中添加 Activity 指示器并连接 UIActivity Indicator 的对象。

单击 xib 中的“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];

}

然后在代表中，

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

UIImage *img = [UIImage imageWithData: data];

myImageView.image=img;

[activityIndicator stopAnimating];

}

First of all add Activity indicator in xib and connect object of the UIActivity Indicator.

Click "Hides when Stopped" in the xib.

Then,

-(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,

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

UIImage *img = [UIImage imageWithData: data];

myImageView.image=img;

[activityIndicator stopAnimating];

}

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