我无法使用SDWebImage 4.4.5版本下载目标c中的图像。
尝试1:
[self.thumbnailImageView sd_setImageWithURL:[NSURL URLWithString:thumbnailURLString] completed:^(UIImage * _Nullable image, NSError * _Nullable error, SDImageCacheType cacheType, NSURL * _Nullable imageURL) {
}];
尝试2:
[self.thumbnailImageView sd_setImageWithURL:[NSURL URLWithString:thumbnailURLString] placeholderImage:nil options:SDWebImageRefreshCached completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) { if(image != nil){
self.thumbnailImageView.image = image;
} else {
NSLog(@"Photo Not Available, fetch");
[self.thumbnailImageView sd_setImageWithURL:[NSURL URLWithString:thumbnailURLString] placeholderImage:nil options:SDWebImageRefreshCached completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
if(image != nil) { NSLog(@"Lo Res Image Loaded by %ld from '%@'", (long)cacheType, imageURL);
self.thumbnailImageView.image = image;
} else {
self.thumbnailImageView.image = nil;
} }];
} }];
尝试3:
[[SDWebImageDownloader sharedDownloader] downloadImageWithURL:[NSURL URLWithString:thumbnailURLString] options:SDWebImageDownloaderUseNSURLCache progress:nil completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) {
}];
尝试4:
SDWebImageManager *manager = [SDWebImageManager sharedManager];
[manager loadImageWithURL:[NSURL URLWithString:thumbnailURLString] options:SDWebImageDelayPlaceholder progress:^(NSInteger receivedSize, NSInteger expectedSize, NSURL * _Nullable targetURL) {
} completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, SDImageCacheType cacheType, BOOL finished, NSURL * _Nullable imageURL) {
}];
尝试5:
SDWebImageDownloader *manager = [SDWebImageManager sharedManager].imageDownloader;
[manager setValue:@"application/vnd.learning.events.v1+json" forHTTPHeaderField:@"Accept"];
[manager setValue:@"en-US" forHTTPHeaderField:@"Accept-Language"];
[manager setValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
//[manager setValue:savedEmail forHTTPHeaderField:@"Email"];
[manager setValue:savedToken forHTTPHeaderField:@"Authorization"];
[manager downloadImageWithURL:[NSURL URLWithString:thumbnailURLString] options:SDWebImageDownloaderHighPriority progress:^(NSInteger receivedSize, NSInteger expectedSize, NSURL * _Nullable targetURL) {
} completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, BOOL finished) {
self.thumbnailImageView.image = image;
}];
在所有上述情况下,都会得到以下错误:
错误UserInfo={NSErrorFailingURLStringKey=https://thisisnotcorrecturl.net/api/BAImage?ActionFlagId=97&id=615,代码=-999“取消”_NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask NSErrorFailingURLKey=https://thisisnotcorrecturl.net/api/BAImage?ActionFlagId=97&id=615,_NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <92586538-B07D-46FB-8694-3B29AA3F0CB4“.<7> ),_NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask<92586538-B07D-46FB-8694-3B29AA3F0CB4。<7>,NSLocalizedDescription=cancelled}
之前,我们使用了v3.5.4版本,能够用下面的代码下载图像。效果很好。
[self.thumbnailImageView setImageWithURL:[NSURL URLWithString:thumbnailURLString]
placeholderImage:nil
completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {
if (image != nil){
self.thumbnailImageView.image = [self imageResizingToAspetRatio:image];
}
}];
请告诉我是否有任何错误,或任何建议。
更新1:尝试使用post下载图像。请检查一下图像。在升级到SDWebImage v4.4.5之后,相同的图像URL在SDWebImage v3.5.4上工作,它不会倒置图像。
我遗漏了什么配置吗?还安装了pod 'SDWebImage/WebP‘,在构建设置中添加了SD_WEBP=1,->预处理宏。
错误:错误Domain=SDWebImageErrorDomain Code=0“下载图像有0像素”UserInfo={NSLocalizedDescription=Downloaded图像有0像素}
http://testingurl.net/api/Image?ActionFlagId=20&id=864
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发布于 2019-02-28 10:09:50
基本上,如果SDWebImage包含图像,则从任何URL下载它们都没有问题。
但是在您的例子中,您尝试从JSON获取图像。您的服务器API返回一个JSON对象,该对象包含图像为base64String
。当您获得JSON响应时,您需要从json获取base64String
,然后从base64String
创建一个映像。
可以使用此方法使用Objective C
将字符串解码为图像。
- (UIImage *)decodeBase64ToImage:(NSString *)strEncodeData {
NSData *data = [[NSData alloc]initWithBase64EncodedString:strEncodeData options:NSDataBase64DecodingIgnoreUnknownCharacters];
return [UIImage imageWithData:data];
}
发布于 2019-02-28 08:39:21
首先,更新pod并尝试SDWebImage pod版本3.8.2。
第二件事是检查你的图像URL。因为我个人测试的图像下载用这个荚版本和下载功能是可行的。
发布于 2019-12-19 08:05:43
我也面临着同样的问题,我正在尝试webP图片。后来我意识到,我需要将webP编码器添加到SDImageCodersManager中。有点像
SDImageCodersManager.shared.addCoder(SDImageWebPCoder.shared)
这是我在AppDelegate做的。
https://stackoverflow.com/questions/54538780
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