Question

I would like show my view immediately when I call it. I don’t know how to make the view show.

-(IBAction) showProgress: (id) sender {
   progressViewController *progress = [[progressViewController alloc] initWithNibName:@"progressViewController" bundle:NULL];
   [self.view addSubview:progress.view];
   [self someFunctionWhichTakesAgesToBeDone];
}

It’s called from current UIViewController. And the view appears after the long function. How can I show it before the long funcion? Thanks for answer.

Answer 1

https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/nsobject_Class/Reference/Reference.html

- (void)performSelectorOnMainThread:(SEL)aSelector withObject:(id)arg waitUntilDone:(BOOL)wait`

use

[self.view performSelectorOnMainThread:@selector(addSubview:) withObject:progress.view waitUntilDone:YES]

or put your Sleep() function (i hope it’s anything else, Sleep() func is really bad, as its been told) into another function MySleepFunc and call

[self performSelector:@selector(MySleepFunc) withObject:nil afterDelay:0.003]

instead of Sleep(3).