iOS - Ensure execution on main thread [duplicate]
This will do it:
[[NSOperationQueue mainQueue] addOperationWithBlock:^ { //Your code goes in here NSLog(@"Main Thread Code");}];Hope this helps!
When you're using iOS >= 4
dispatch_async(dispatch_get_main_queue(), ^{ //Your main thread code goes in here NSLog(@"Im on the main thread"); });
there any rule I can follow to be sure that my app executes my own code just in the main thread?
Typically you wouldn't need to do anything to ensure this — your list of things is usually enough. Unless you're interacting with some API that happens to spawn a thread and run your code in the background, you'll be running on the main thread.
If you want to be really sure, you can do things like
[self performSelectorOnMainThread:@selector(myMethod:) withObject:anObj waitUntilDone:YES];to execute a method on the main thread. (There's a GCD equivalent too.)