我正在从服务器获取 Base64 编码的文件内容。然后我将数据写入文件。之后我检查文件不为空，这意味着数据已成功写入文件。但是当我尝试呈现该文件时，我得到的只是一个空 View 。那么我做错了什么？ enter image description here
[f getFile:^(NSString * _Nonnull string) {
NSString *docsDir;
NSArray *dirPaths;
NSData *content = [string dataUsingEncoding:NSUTF8StringEncoding];
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *databasePath = [[NSString alloc] initWithString:[docsDir stringByAppendingPathComponent:@"hill.jpg"]];
[content writeToFile:databasePath atomically:YES];
if ([[NSFileManager defaultManager] fileExistsAtPath:databasePath]){
NSURL *url = [NSURL fileURLWithPath:databasePath];
UIDocumentInteractionController *documentInteractionController =[UIDocumentInteractionController interactionControllerWithURL:url];
documentInteractionController.delegate = self;
[documentInteractionController presentPreviewAnimated:YES];
}
} Error:^(NSString * _Nonnull errorMessage) {
}];
最佳答案
编辑了您的代码片段，尝试一下
[f getFile:^(NSString * _Nonnull string) {
NSString *docsDir;
NSArray *dirPaths;
NSData *content = [[NSData alloc] initWithBase64EncodedString: string options:0];
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *databasePath = [[NSString alloc] initWithString:[docsDir stringByAppendingPathComponent:@"hill.jpg"]];
[content writeToFile:databasePath atomically:YES];
if ([[NSFileManager defaultManager] fileExistsAtPath:databasePath]){
NSURL *url = [NSURL fileURLWithPath:databasePath];
UIDocumentInteractionController *documentInteractionController =[UIDocumentInteractionController interactionControllerWithURL:url];
documentInteractionController.delegate = self;
[documentInteractionController presentPreviewAnimated:YES];
}
} Error:^(NSString * _Nonnull errorMessage) {
}];
关于ios - 在 iOS 中保存和查看文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54651229/