Is there a way to set navigation bar gradient color globally? about chameleon

[vicc]

@annehiro This is actually fairly easy. Since a gradient color is simply a UIColor, you can use Apple's UIAppearance protocol to do exactly what you want.

Here's a quick example to get you started. In your app's delegate, simply do the following:

    //1. Define the frame for our GradientColor to cover (default navigation bar size)
    CGRect defaultNavigationBarFrame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 64);

    //2. Create an array of colors you'd like to use in your gradient
    NSArray *colors = [NSArray arrayWithObjects:FlatYellow, FlatRed, nil];

    //3. Create your gradient color
    UIColor *myGradientColor = [UIColor colorWithGradientStyle:UIGradientStyleTopToBottom
                                                     withFrame:defaultNavigationBarFrame
                                                     andColors:colors];

    //4. Modify the barTintColor for all instances of UINavigationBar
    [[UINavigationBar appearance] setBarTintColor:myGradientColor];

Of course, you could also simplify it down to one line of code:

[[UINavigationBar appearance] setBarTintColor:[UIColor colorWithGradientStyle:UIGradientStyleTopToBottom
                                                                        withFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 64)
                                                                        andColors:[NSArray arrayWithObjects:FlatYellow, FlatRed, nil]]];

And if that's not short enough, you can use Chameleon Shorthand to shorten it even more.

[[UINavigationBar appearance] setBarTintColor:GradientColor(UIGradientStyleTopToBottom,
                                                                CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 64),
                                                                (@[FlatYellow, FlatRed]))];

Note: Don't forget to add a set of parentheses around your color array if using Chameleon Shorthand.

Hopefully this is enough to get you started. Let me know if you have anymore questions. 😃

[vicc]

I'm gonna go ahead and close this, since it seems like you may have figured it out. Feel free to open up a new issue if you're having any other troubles. 👍