ASIHTTPRequest内存泄漏 [英] ASIHTTPRequest memory leaks

问题描述

我有一个iOS项目，在我自己的班级中使用ARC，但是在其他库(例如ASIHTTPRequest)中关闭了ARC.

I have a iOS project in which I am using ARC in my own classes, but have ARC turned off in other libraries like ASIHTTPRequest.

使用下面的代码从Web服务器获取图像时，我正在发生大量内存泄漏:

I'm getting huge memory leaks using the code below to fetch an image from a web server:

-(void)buildPhotoView {

self.photoLibView.hidden = NO;

NSString *assetPathStr = [self.cellData objectForKey:@"AssetThumbPath"];

// get the thumbnail image of the ocPHOTOALBUM from the server and populate the UIImageViews
NSURL *imageURL = [NSURL URLWithString:assetPathStr];

__block ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:imageURL];
__unsafe_unretained ASIHTTPRequest *weakRequest = request;
[weakRequest setCompletionBlock:^{

    // put image into imageView when request complete
    NSData *responseData = [weakRequest responseData];
    UIImage *photoAlbumImage = [[UIImage alloc] initWithData:responseData];
    self.photo1ImageView.image = photoAlbumImage;
}];
[weakRequest setFailedBlock:^{
    NSError *error = [request error];
    NSLog(@"error geting file: %@", error);
}];
[weakRequest startAsynchronous];

}

我已经修改了ASIHTTPRequest示例代码页中的示例代码，以消除Xcode中的编译器警告.

I've modified the sample code from the ASIHTTPRequest example code page to eliminate compiler warnings in Xcode.

如何摆脱这些内存泄漏?我似乎只有在使用积木时才得到它们.

How can I get rid of these memory leaks? I only seem to get them when using blocks.

推荐答案

您从完成块内部引用了错误的请求变量.您应该在块中引用request(这就是为什么使用__block标识符声明它的原因).实际上，您根本不需要声明weakRequest.

You're referencing the wrong request variable from inside the completion block. You should reference request in the block (that's why you declare it with the __block identifier). In fact, you shouldn't need to declare weakRequest at all.

如果您希望将请求保留在内存中，请将其存储在您的类的@property (retain)中(也许是使用buildPhotoView方法的请求).

If you want the request to be kept in memory, store it in an @property (retain) in your class (the one with the buildPhotoView method perhaps).

这篇关于ASIHTTPRequest内存泄漏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！