iOS - Ensure execution on main thread

Question

I want to know how to call my function on the main thread   How do I make sure my function is called on the main thread    this follows a previous question of mine

User · Accepted Answer

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.)

User · Answer

i think this is cool  even tho in general its good form to leave the caller of a method responsible for ensuring its called on the right thread   if     NSThread currentThread  isMainThread          self performSelector  cmd onThread  NSThread mainThread  withObject someObject waitUntilDone NO       return

User · Answer

This will do it     NSOperationQueue mainQueue  addOperationWithBlock           Your code goes in here    NSLog   Main Thread Code           Hope this helps

User · Answer

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

[ios] iOS - Ensure execution on main thread

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