我正在尝试使用 AFNetworking 3.0 这样做下载图像：
- (UIImage *) loadImage:(NSString *) link
{
__block UIImage *image = [UIImage imageNamed:@"no_user_profile_pic.png"];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFImageResponseSerializer serializer];
[manager GET:[link stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLHostAllowedCharacterSet]]
parameters:nil
progress:nil
success:^(NSURLSessionTask *task, id responseObject) {
image = (UIImage *) responseObject;
} failure:^(NSURLSessionTask *operation, NSError *error) {
NSLog(@"Load Image error - %@", [error description]);
}];
return image;
}
每次我收到此错误时：
*** -[AFHTTPRequestSerializer requestWithMethod:URLString:parameters:error:] 中的断言失败，/Users/.../AFNetworking/AFURLRequestSerialization.m:353
我不明白我做错了什么。发生什么错误？
如果您使用AFNetworking 3.0则需要添加头文件AFImageDownloader.h:
#import <AFNetworking/AFImageDownloader.h>
并使用该方法downloadImageForURL请求:
NSString *stringVideo = [NSString stringWithFormat:@"https:%@", your link];
AFImageDownloader *downloader = [[AFImageDownloader alloc] init];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString: stringVideo]];
[downloader downloadImageForURLRequest:request success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull responseObject) {
NSLog(@"Succes download image");
}failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
NSLog(@"Error download image");
}];
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