Question

I’m trying to change the alignment of a UILabel on the main thread like this

[updateLabel performSelectorOnMainThread:@selector(setTextAlignment:) withObject:UITextAlignmentCenter waitUntilDone:YES];

However this generates a “makes pointer from integer without cast error. What’s the correct way to do this?

Answer 1

This is not going to work because UITextAlignmentCenter is not a pointer to an object, but a simple integer. A solution is to implement an own method on the view controller that sets the alignment to center via updateLabel.textAlignment = UITextAlignmentCenter; and calling [yourViewController performSelectorOnMainThread:@selector(setUpdateLabelTextAlignmentToCenter) withObject:nil waitUntilDone:YES];