Does UIDocumentSaveForCreating close the document after creation?

Question

What is the behavior of [UIDocument saveToURL:forSaveOperation:completionHandler:] when invoked with UIDocumentSaveForCreating?

Approach#1 - saveToURL: closes the document after save

Then no need to close the document.

MYDocument *document = [[MYDocument alloc] initWithFileURL:fileURL];
[document saveToURL:fileURL forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL saveSuccess) {
    if (!saveSuccess) {
        ALog(@"Failed to create file at %@", fileURL);
        failureBlock();
        return;
    }
    successBlock(fileURL);
}];

Approach#2 - saveToURL: does not close the document after save

Then I would have to close the document myself, like this:

MYDocument *document = [[MYDocument alloc] initWithFileURL:fileURL];
[document saveToURL:fileURL forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL saveSuccess) {
    if (!saveSuccess) {
        ALog(@"Failed to create file at %@", fileURL);
        failureBlock();
        return;
    }
    [document closeWithCompletionHandler:^(BOOL closeSuccess) {
        if(!closeSuccess) {
            ALog(@"Error during close after creating %@", fileURL);
            failureBlock();
            return;
        }
        successBlock(fileURL);
    }];
}];

score 0 · Accepted Answer · answered Oct 08 '13 at 19:46

Aha realized that UIDocument has a documentState property.

In step1 the documentState returns UIDocumentStateNormal, so it is open.

In step2 the documentState returns UIDocumentStateClosed, so it is closed.

MYDocument *document = [[MYDocument alloc] initWithFileURL:fileURL];
[document saveToURL:fileURL forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL saveSuccess) {
    if (!saveSuccess) {
        NSLog(@"Failed to create file at %@", fileURL);
        failureBlock();
        return;
    }
    NSLog(@"step1: documentState: %d", document.documentState);
    [document closeWithCompletionHandler:^(BOOL closeSuccess) {
        if(!closeSuccess) {
            NSLog(@"Error during close after creating %@", fileURL);
            failureBlock();
            return;
        }
        NSLog(@"step2: documentState: %d", document.documentState);
        successBlock(fileURL);
    }];
}];

So NO is the answer my own question

Does UIDocumentSaveForCreating close the document after creation?

Does UIDocumentSaveForCreating close the document after creation?

Approach#1 - saveToURL: closes the document after save

Approach#2 - saveToURL: does not close the document after save

1 Answers1