怎么样？用的UITableViewCell通过的UIImageView ASINetworkQueue异步加载

问题描述

我在尝试使用异步 ASINetworkQueue 来加载表格单元格的图像文件。我只是想不通出来，似乎无法找到一个很好的简单的例子。

I'm trying to load some images in table cells asynchronously using ASINetworkQueue. I just can't figure it out and can't seem to find a good SIMPLE example.

我能找到的最好的是这一点，但它只是完全矫枉过正，有点过于复杂，对我来说：
的

The best I can find is this, but its just totally overkill and a little too complicated for me:http://kosmaczewski.net/2009/03/08/asynchronous-loading-of-images-in-a-uitableview/

没有任何人有任何提示/解决方案/ code为与 ASIHTT prequest 图书馆这样做呢？

Does anyone else have any tips/solutions/code for doing this with the ASIHTTPRequest library?

推荐答案

下面是UIImageView的，我用的派生类，也许这会帮助你。 （其实我这简化了从我用公平一点，但那是你问什么！）

Here's a class derived from UIImageView which I use, perhaps this will help you. (Actually I've simplified this a fair bit from what I use, but that was what you asked for!)

头文件，UIHTTPImageView.h：

Header file, UIHTTPImageView.h:

#import "ASIHTTPRequest.h"

@interface UIHTTPImageView : UIImageView {
    ASIHTTPRequest *request;
}

- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder;

@end

和UIHTTPImageView.m：

and UIHTTPImageView.m:

#import "UIHTTPImageView.h"

@implementation UIHTTPImageView        

- (void)setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder {
    [request setDelegate:nil];
    [request cancel];
    [request release];

    request = [[ASIHTTPRequest requestWithURL:url] retain];
    [request setCacheStoragePolicy:ASICachePermanentlyCacheStoragePolicy];

    if (placeholder)
        self.image = placeholder;

    [request setDelegate:self];
    [request startAsynchronous];
}

- (void)dealloc {
    [request setDelegate:nil];
    [request cancel];
    [request release];
    [super dealloc];
}

- (void)requestFinished:(ASIHTTPRequest *)req
{

    if (request.responseStatusCode != 200)
        return;

    self.image = [UIImage imageWithData:request.responseData];
}

@end

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