Question

除了使用方法uiimage之外，如何从nsurl获取NSData *data = [NSData dataWithContentsOfURL:url]; 在nsthread正在运行时，ui元素无法正常工作

Answer 1

我个人倾向于使用NSOperationQueue。

见

http://developer.apple.com/cocoa/managingconcurrency.html

http://blog.9mmedia.com/?p=549

Answer 2

来自Gowalla的AFNetworking库有一种在后台加载图像的简单方法。见here

Answer 3

我喜欢使用ASIHttpRequest。它会是这样的。

ASIHTTPRequest * request = [ASIHTTPRequest requestWithURL:url];

[request setCompletionBlock:^{
    NSData * responseData = [request responseData];
    UIImage * image = [UIImage imageWithData:responseData];
}];
[request setFailedBlock:^{
    NSLog(@"Failed to load image : %@", [request.error localizedDescription]);
}];

[request startAsynchronous];

Answer 4

对于背景图片下载，您可以尝试

https://github.com/AFNetworking/AFNetworking/

Answer 5

浏览此链接：http：//www.markj.net/iphone-asynchronous-table-image/

下载

AsyncImageView.h AsyncImageView.m

将这些文件添加到您的项目中并将其导入您的课程

写下这些行，你想要添加imagesubview：

AsyncImageView * asyncImageView = [[AsyncImageView alloc] initWithFrame：CGRectMake（80,10,60,20）;]; NSURL * url = [NSURL URLWithString：imageUrl]; [asyncImageView loadImageFromURL：url]; asyncImageView.backgroundColor = [UIColor clearColor]; [myimageView addSubview：asyncImageView]; [asyncImageView release];

你会得到

从图像网址中检索图像

5 个答案: