change UILabel's text color for total project

Question

i want to change all the UILabel's text color for total app how can i do this .is there any simple way to change label color.

i tried this ,but i want to change write this code in every class

for( UIView *view in [testScroll subviews])
    {
        if([view isKindOfClass:[UILabel class]])
        {
            [(UILabel *)view setTextColor:[UIColor whiteColor]];

        }
        else if([view isKindOfClass:[UIView class]])

    }

Do anyone have simple method .

Style

Are you targeting iOS 5+ ? – Karame

Answer 1

Well if you're targeting iOS 5+ you could do that really easy (inside you appdelegate):

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //...

    //This color will affect every label in your app
    [[UILabel appearance] setTextColor:[UIColor redColor]]; 

    //...

    return YES;
}

This works because UILabel conforms to UIAppearance protocol, so you could customize any class that conforms to the protocol like this. For more information on this here is a nice tutorial to get you started and here is Apple's docs on the protocol

Karame

Blue is prettier: [[UILabel appearance] setColor:[UIColor blueColor]]; ^^ – Grosberg

Changed my mind: [[UILabel appearance] setColor:[UIColor purpleColor]]; – Grosberg

+1 simple and affective. Not sure why you would do it any other way. – Haug

It seems there could be some issues using this method according to discussion in this post here #11839544. I haven't tried it personally. – Andriaandriana

To my knowledge UIlabel and UIButton conforms to the UIAppearanceContainer protocol but don't actually have any property marked with UI_APPEARANCE_SELECTOR – Particiaparticipant

@Karame In fact in the Ray wenderlich article you have posted, its mentioned you should not customize UILabel using appearance proxy. – Andriaandriana

@Filip XD, @Adi I wouldn't post the answer without testing it first. Maybe was a bug that is fixed now but setTextColor: does work for me. – Karame

[[UILabel appearance] setColor:[UIColor blueColor]];works for me i want to make headings with separate color and bold how to do that? – Style

@Style is setTextColor: not setColor: – Karame

@Adi Ray's updated tutorial includes UILabel and so does this one. Though it's pretty easy to give it a spin and see how it works. – Karame

Answer 2

@interface CustomLabel : UILabel
 @end

 @implementation CustomLabel

 - (id)init{
  if ([super init]){
      self.textColor = // Putt here the color you want.
  }

   return self;
 }

and now jus use your CustomLabel.

Allethrin

can i change in appdelegate file – Style

Why would you do this when you can just use [[UILabel appearance] setTextColor:[UIColor redColor]];? Which will change the text color of all UILabels. Please could you explain and give a reason to do it your way over using appearance? – Haug

@Haug because doing with UIAppareance is not flexible,imagine if one day he wants that one label will we redColor and all the others blue color :) – Allethrin

That's fine you can just change it for that particular label, and that isn't what they have asked. Not going to downvote as it is still correct but I am not going to upvote ever as I wouldn't do it this way. – Haug

Answer 3

Create a subclass of the UILabel. You can override the init functions where you can set the text Color you want. Use that subclass throughout your project.

Andriaandriana

Why would you do this when you can just use [[UILabel appearance] setTextColor:[UIColor redColor]];? Which will change the text color of all UILabels. Please could you explain and give a reason to do it your way over using appearance? – Haug

@Haug It seems there are some issues with using UIAppearence proxy on UILabel. Refer https://mcmap.net/q/340304/-how-do-i-apply-uiappearance-proxy-properties-to-uilabel – Andriaandriana

@Haug i couldn't get redcolor labels using ur statement – Style

@Adi I can't say I have ever experienced any of these issues. I use it all the time and it works fine for me. I'm going to make the point that I'm not going to downvote as it is still correct, but I am not going to upvote ever as I wouldn't do it this way I would do it Alladinians way. – Haug

@Haug Yes, using appearance proxy for UILabel would had been the best method if not for this uncertainty. Hopefully it will be stable in ios7. – Andriaandriana

@Adi Sorry I'm not sure I see your issue with UIAppearence I have never had any issues with it, it has always worked the way I want it to work. – Haug