我一个多星期以来一直面临这个问题，我无法从 Assets 库 url 获取原始照片/视频路径。
我可以通过将此文件保存到我的应用程序 SandBox 来获取它的数据，但在这里我想避免这种情况再次创建该文件的另一个副本。
我在 DropBox 中投资了这个，他们直接从 Assets 库 url 上传。所以，请帮我解决这个问题。
提前致谢。
这是我的代码:
-(NSString*) videoAssetURLToTempFile:(NSString*)combineURL{
self.activityIndicator.hidden = FALSE;
NSLog(@"combineURL: %@",combineURL);
NSArray *arr = [combineURL componentsSeparatedByString:@"->"];
NSString *index = [arr objectAtIndex:0];
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@",[arr objectAtIndex:1]]];
//url like: "assets-library://asset/asset.MOV?id=78988A2B-203B-41B9-8EDA-F3029303DFBF&ext=MOV"
NSString * surl = [url absoluteString];
NSString * ext = [surl substringFromIndex:[surl rangeOfString:@"ext="].location + 4];
NSTimeInterval ti = [[NSDate date]timeIntervalSinceReferenceDate];
NSString *fname = [NSString stringWithFormat: @"%f.%@",ti,ext];
NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"SAVED_PHOTOS"];
// New Folder is your folder name
NSError *error = nil;
if (![[NSFileManager defaultManager] fileExistsAtPath:stringPath])
[[NSFileManager defaultManager] createDirectoryAtPath:stringPath withIntermediateDirectories:NO attributes:nil error:&error];
NSString *tmpfile = [stringPath stringByAppendingPathComponent:fname];
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset){
ALAssetRepresentation * rep = [myasset defaultRepresentation];
NSLog(@"video url: %@",rep.url);
NSUInteger size = [rep size];
NSLog(@"file size: %@",[NSString stringWithFormat:@"%llu",(unsigned long long)rep.size]);
if (!appDelegate.arrFileSize) {
appDelegate.arrFileSize = [[NSMutableArray alloc] init];
}
[appDelegate.arrFileSize replaceObjectAtIndex:[index integerValue] withObject:[NSString stringWithFormat:@"%llu",(unsigned long long)rep.size]];
[appDelegate.accessToken setObject:appDelegate.arrFileSize forKey:@"FileSize"];
[appDelegate.accessToken synchronize];
NSLog(@"video fileSize: %@",[self convertbyteToKB_MB:(unsigned long long)rep.size]);
unsigned long long freeSpaceSize = [self getFreeDiskspace];
NSLog(@"freeSpaceSize: %llu",freeSpaceSize);
if (freeSpaceSize<rep.size && rep.size<1073741824) {
NSString *alertMsg;
if (IS_IPHONE) {
alertMsg = [NSString stringWithFormat:@"App requires %@ free storage space to upload this video. To proceed with this upload, please go to your iPhone's Settings and clear some space.",[self convertbyteToKB_MB:(unsigned long long)rep.size]];
}
else{
alertMsg = [NSString stringWithFormat:@"App requires %@ free storage space to upload this video. To proceed with this upload, please go to your iPad's Settings and clear some space.",[self convertbyteToKB_MB:(unsigned long long)rep.size]];
}
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:alertMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alert show];
dispatch_async(dispatch_get_main_queue(), ^{
self.waitToUploadLbl.hidden = TRUE;
});
});
}
else{
if (rep.size>=1073741824) {
dispatch_async(dispatch_get_main_queue(), ^{
self.waitToUploadLbl.hidden = TRUE;
});
}
else{
convertingTotal++;
dispatch_async(dispatch_get_main_queue(), ^{
self.waitToUploadLbl.hidden = FALSE;
});
const int bufferSize = 8*1024*1024;
FILE* f = fopen([tmpfile cStringUsingEncoding:1], "wb+");
if (f == NULL) {
return;
}
Byte * buffer = (Byte*)malloc(bufferSize);
unsigned long long read = 0, offset = 0, written = 0;
NSError* err;
if (size != 0) {
do {
read = (unsigned long long)[rep getBytes:buffer
fromOffset:offset
length:bufferSize
error:&err];
written = (unsigned long long)fwrite(buffer, sizeof(char), read, f);
offset += read;
} while (read != 0);
blockedNo++;
}
fclose(f);
NSLog(@"file saved to temp");
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"total: %d blockedNo: %d",convertingTotal,blockedNo);
self.waitToUploadLbl.hidden = TRUE;
});
}
}
};
ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror)
{
//NSLog(@"Can not get asset - %@",[myerror localizedDescription]);
};
if(url)
{
ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
[assetslibrary assetForURL:url
resultBlock:resultblock
failureBlock:failureblock];
}
self.activityIndicator.hidden = TRUE;
@try {
[appDelegate.uploadArray1 replaceObjectAtIndex:[index integerValue] withObject:tmpfile];
[appDelegate.accessToken setObject:appDelegate.uploadArray1 forKey:@"UploadArray"];
[appDelegate.accessToken synchronize];
NSLog(@"temporary path: %@",tmpfile);
[self performSelector:@selector(uploadphotoToServer:) withObject:index afterDelay:1];
}
@catch (NSException *exception) {
NSLog(@"Error: %@",exception);
}
@finally {
dispatch_async(dispatch_get_main_queue(), ^{
if (convertingTotal==blockedNo) {
self.waitToUploadLbl.hidden = TRUE;
}
});
}
return tmpfile;
}
最佳答案
i hope this will help you
NSString *str_url=[arrURL objectAtIndex:indexPath.row];//put your index
ALAssetsLibrary *assetLibrary=[[ALAssetsLibrary alloc] init];
NSURL* aURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@",str_url]];
[assetLibrary assetForURL:aURL resultBlock:^(ALAsset *asset) {
ALAssetRepresentation *rep = [asset defaultRepresentation];
Byte *buffer = (Byte*)malloc(rep.size);
NSUInteger buffered = [rep getBytes:buffer fromOffset:0.0 length:rep.size error:nil];
NSData *data = [NSData dataWithBytesNoCopy:buffer length:buffered freeWhenDone:YES];
cell.imageCell.image=[UIImage imageWithData:data];
} failureBlock:^(NSError *error)
{
NSLog(@"Error: %@",[error localizedDescription]);
}];
关于ios - 如何从 iOS/iPhone 中的 Assets 库获取照片/视频源路径？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24406287/