iOS图像视图：我该如何实现？

Question

如图中的照片所示，图像视图中的占位符与在后台下载图像的大小相同，该如何实现呢？

Answer 1

You can use AFNetworking for this. It is the best Networking Library available for iOS. Even best apps like Facebook iOS app is using AFNetworking.

#import "UIImageview+AFNetworking.h"

After importing just use like this

[imageView setImageWithURLRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://someurl.com"]
                           placeholderImage:[UIImage imageNamed:@"loading.png"]
                                    success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {

                                        imageView.image = image;


                                    } failure:nil];