Question

I am getting the Expected ‘:’ before ‘.’ token error with this piece of code:
[SecondViewController.view setNeedsDisplay];

.h:

#import <UIKit/UIKit.h>
#define AS(A,B)    [(A) stringByAppendingString:(B)]

@interface SecondViewController : UIViewController{

.m:

[SecondViewController.view setNeedsDisplay];

Any hints ?

And if your wondering i am trying to Refresh the view

Answer 1

You are actually trying to access the Class object for your controller and not an instance object (which is what view property is defined on). Additionally setNeedsDisplay: needs a boolean parameter.

So either use this syntax if it’s called from within the view controller:

[self.view setNeedsDisplay:YES]; 

Or this syntax if it’s from somewhere else:

SecondViewController *myController;
...
[myController.view setNeedsDisplay:YES];