- (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
self.contentHandler = contentHandler;
self.bestAttemptContent = [request.content mutableCopy];

NSString * attchUrl = [request.content.userInfo objectForKey:@"image"];
//下载图片,放到本地
UIImage * imageFromUrl = [self getImageFromURL:attchUrl];

//获取documents目录
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString * documentsDirectoryPath = [paths objectAtIndex:0];

NSString * localPath = [self saveImage:imageFromUrl withFileName:@"MyImage" ofType:@"png" inDirectory:documentsDirectoryPath];
if (localPath && ![localPath isEqualToString:@""]) {
 UNNotificationAttachment * attachment = [UNNotificationAttachment attachmentWithIdentifier:@"photo" URL:[NSURL URLWithString:[@"file://" stringByAppendingString:localPath]] options:nil error:nil];
 if (attachment) {
 self.bestAttemptContent.attachments = @[attachment];
 }
}
self.contentHandler(self.bestAttemptContent);
}

- (UIImage *) getImageFromURL:(NSString *)fileURL {
NSLog(@"执行图片下载函数");
UIImage * result;
//dataWithContentsOfURL方法需要https连接
NSData * data = [NSData dataWithContentsOfURL:[NSURL URLWithString:fileURL]];
result = [UIImage imageWithData:data];

return result;
}

//将所下载的图片保存到本地
-(NSString *) saveImage:(UIImage *)image withFileName:(NSString *)imageName ofType:(NSString *)extension inDirectory:(NSString *)directoryPath {
NSString *urlStr = @"";
if ([[extension lowercaseString] isEqualToString:@"png"])
{
 urlStr = [directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", imageName, @"png"]];
 [UIImagePNGRepresentation(image) writeToFile:urlStr options:NSAtomicWrite error:nil];
} else if ([[extension lowercaseString] isEqualToString:@"jpg"] ||
  [[extension lowercaseString] isEqualToString:@"jpeg"])
{
 urlStr = [directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.%@", imageName, @"jpg"]];
 [UIImageJPEGRepresentation(image, 1.0) writeToFile:urlStr options:NSAtomicWrite error:nil];
} else
{
 NSLog(@"extension error");
}
return urlStr;
}

- (void)didReceiveNotification:(UNNotification *)notification {
NSLog(@"嘿嘿");
self.label.text = notification.request.content.body;
UNNotificationContent * content = notification.request.content;
UNNotificationAttachment * attachment = content.attachments.firstObject;
if (attachment.URL.startAccessingSecurityScopedResource) {
 self.imageView.image = [UIImage imageWithContentsOfFile:attachment.URL.path];
}
}