Creating an UIImage from a URL

最新推荐文章于 2025-11-23 15:46:43 发布

原创最新推荐文章于 2025-11-23 15:46:43 发布 · 119 阅读

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本文介绍了如何通过Objective-C从互联网下载一张图片，并将其转换为UIImage对象的过程。具体步骤包括：使用NSURL获取图片URL，利用NSData下载图片内容，最后初始化UIImage对象。

A question came up over the weekend as to download an image off the internet and add it to a UIImage object on the iPhone. The answer is to create an NSData object that grabs the contents of the URL and then initialize the image with that data, as such:

id path = @"http://merrimusings.mu.nu/archives/images/groundhog2.jpg";
NSURL *url = [NSURL URLWithString:path];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *img = [[UIImage alloc] initWithData:data cache:NO];