I want to do something like this: In Setting of app, can chose a color, after that some UI element like Navigationbar, tabbar highlight will change to that color.
Is there anyway of tut for that?
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3what effort have you made? – Daniel A. White Oct 14 '15 at 01:24
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I can do this by set navigation bar color in each view, but what I want is call one func somewhere in app and it change all – Nguyen Khoi Oct 14 '15 at 01:26
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You can get an idea from link http://stackoverflow.com/questions/31217748/uicolor-code-in-a-variable-in-swift – Amit Raj Oct 14 '15 at 05:12
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Well? What happened? Did you figure it out? – Adrian Oct 15 '15 at 02:13
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Not yet. My problem is I can not tell the element change color – Nguyen Khoi Oct 15 '15 at 04:42
2 Answers
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Here's how you'd do it in Objective-C.
- (void)setCustomizedNavigationBarStyle {
// UIBarButtonItem styling
NSShadow *shadow = [[NSShadow alloc]init];
shadow.shadowOffset = CGSizeMake(0.0, 1.0);
shadow.shadowColor = [UIColor clearColor];
NSDictionary *enabledTextAttributeDictionary = @{NSForegroundColorAttributeName : [UIColor darkGrayColor], NSShadowAttributeName: shadow, NSFontAttributeName:[UIFont fontWithName:@"GillSans" size:17.0]};
[[UIBarButtonItem appearanceWhenContainedInInstancesOfClasses:@[[UINavigationBar class]]] setTitleTextAttributes:enabledTextAttributeDictionary forState:UIControlStateNormal];
NSDictionary *disabledTextAttributeDictionary = @{NSForegroundColorAttributeName : [UIColor lightGrayColor], NSShadowAttributeName: shadow, NSFontAttributeName:[UIFont fontWithName:@"GillSans" size:17.0]};
[[UIBarButtonItem appearanceWhenContainedInInstancesOfClasses:@[[UINavigationBar class]]] setTitleTextAttributes:disabledTextAttributeDictionary forState:UIControlStateDisabled];
// UINavigationBarTitle styling
NSDictionary *titleAttributeDictionary = @{NSForegroundColorAttributeName : [UIColor blackColor], NSShadowAttributeName: shadow, NSFontAttributeName:[UIFont fontWithName:@"GillSans" size:18.0]};
[[UINavigationBar appearanceWhenContainedInInstancesOfClasses:@[[UINavigationController class]]]setTitleTextAttributes:titleAttributeDictionary];
}
You could call this in didFinishLaunchingWithOptions. Once you translate to Swift, you'd add this line to didFinishLaunchingWithOptions:
setCustomizedNavigationBarStyle()
This should be readily translatable into Swift.
Adding to this, you can create a custom palette of colors. You may find this post on the topic helpful:
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You could save the color in NSUserDefaults and retrieve it by the key whenever you need to set that color to your view elements. You'll need an extension to NSUserDefaults that returns an UIColor.
Check out the accepted answer to this question.
Hope it helps!
