On 4/25/15, Mike Abdullah <mabdul...@karelia.com> wrote:
> Apple's APIs here are deliberately asynchronous. You need to make your code
> handle that properly. Don't try to force it to be synchronous.
Some things need to be synchronous though. If I'm saving a file, I
don't want to do anything else unless the file is saved, or perhaps
the operation is cancelled by the user.
What's your take on the following? I found the bit with the runloop
at stackoverflow.
+ (NSString*) copyFileName: (NSString*) question
withTextPrompt: (NSString*) prompt
{
ModalAlertDelegate *delegate = [[ModalAlertDelegate alloc] init];
assert( nil != delegate );
assert( 1 == [delegate retainCount] );
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle: question
message: @"Untitled"
delegate: delegate
cancelButtonTitle: @"Cancel"
otherButtonTitles: @"OK", nil];
alertView.alertViewStyle = UIAlertViewStylePlainTextInput;
assert( 1 == [alertView retainCount] );
assert( 1 == [delegate retainCount] );
[alertView show];
while( [alertView isVisible] ){
NSRunLoop *rl = [NSRunLoop currentRunLoop];
NSDate *today = [[NSDate alloc] init];
[rl runUntilDate: today];
[today release];
}
[alertView release];
NSString *result = [delegate.text copy];
[delegate release];
return result;
}
delegate.text is copied from the UIAlertView's text field in the
delegate's buttonClickedAtIndex method.
I don't yet have a way to report that the user cancelled but that will
be simple to add. This seems to work as far as it goes.
--
Michael David Crawford, Consulting Software Engineer
mdcrawf...@gmail.com
http://www.warplife.com/mdc/
Available for Software Development in the Portland, Oregon Metropolitan
Area.
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