我看不到任何图片.为什么？

Question

我看不到任何图片.为什么？

UIImage *photoImg = [UIImage imageNamed:@"http://blog.leadcritic.com/wp-content/uploads/2011/02/favorite_animal_picture.jpg"];
UIImageView *imageView2 = [[UIImageView alloc] initWithImage:photoImg];
[self.view addSubview:imageView2];

Answer 1

因为如果你使用代码:

[UIImage imageNamed:@"mypicture.png"];

图像应该在iPhone上,而不是从URL加载.从URL您需要使用以下内容:

NSString path = @"http://blog.leadcritic.com/wp-content/uploads/2011/02/favorite_animal_picture.jpg";
NSURL *url = [NSURL URLWithString:path];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *photoImg = [[UIImage alloc] initWithData:data cache:NO];
UIImageView *imageView2 = [[UIImageView alloc] initWithImage:photoImg];