How to read conflicted UIDocument from unresolvedConflictVersionsOfItemAtURL:

Question

When Conflict occur in UIDocument I can get all conflicted version by calling unresolvedConflictVersionsOfItemAtURL: on NSFileVersion but how can I get UIDocument (snapshot) of that versions ?

I want to loop all versions and merge it myself.

Updated I have come across this How can I merge conflicted UIDocument's in iCloud? and try to do it this way, but I don't think its correct one because open UIDocument is asynchronous operation. What is the right way to do this ?

    NSFileVersion *currentVersion = [NSFileVersion currentVersionOfItemAtURL:senderDocument.fileURL];
    NSArray *conflictedVersions = [NSFileVersion unresolvedConflictVersionsOfItemAtURL:senderDocument.fileURL];
    RecentDocument *currentDocument = [[RecentDocument alloc] initWithFileURL:currentVersion.URL];
    [currentDocument openWithCompletionHandler:^(BOOL success) {
        if (!success) {
            NSLog(@"Failed to open");
            return ;
        }
        for (NSFileVersion *version in conflictedVersions) {
            RecentDocument *conflictedDocument = [[RecentDocument alloc] initWithFileURL:version.URL];
            [conflictedDocument openWithCompletionHandler:^(BOOL success) {
                if (!success) {
                    NSLog(@"Failed to open");
                    return ;
                }
            }];
        }
    }];

Answer 1

Instead of calling openWithCompletionHandler, you want to do something along the lines of:

RecentDocument * thisDoc = [[RecentDocument alloc] initWithFileURL:url];
NSError* innerReadError;
[thisDoc readFromURL:url error:&innerReadError];

So swap openWithCompletionHandler with readFromURL and you should be able to access your document right away in order to resolve the conflict.