text color of disabled uibarbuttonitem is always the color of the normal state

问题

i wrote in my code

[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil]  setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor lightGrayColor], NSFontAttributeName:[UIFont boldSystemFontOfSize:16.0f]} forState:UIControlStateDisabled];

[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil]  setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor blueColor], NSFontAttributeName:[UIFont boldSystemFontOfSize:16.0f]} forState:UIControlStateNormal];

but the text color is always blue despite the baritem being disabled.

I'm programming in xcode 5 and ios7

回答1:

for me following code works.

- (void)viewDidLoad {
    [super viewDidLoad];

    UIBarButtonItem * btnTemp = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(btnDone_Click:)];
    [btnTemp setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor lightGrayColor], NSFontAttributeName:[UIFont boldSystemFontOfSize:16.0f]} forState:UIControlStateNormal];

    [btnTemp setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor blueColor], NSFontAttributeName:[UIFont systemFontOfSize:16.0f]} forState:UIControlStateDisabled];


    [self.navigationItem setRightBarButtonItem:btnTemp];

}

- (void)btnDone_Click : (id)sender {

    UIBarButtonItem * button = (UIBarButtonItem *)sender;
    [button setEnabled:FALSE];
    [self performSelector:@selector(enableButton:) withObject:sender afterDelay:2.0f];


}

- (void)enableButton : (id)sender {
    UIBarButtonItem * button = (UIBarButtonItem *)sender;
    [button setEnabled:TRUE];
}

回答2:

I found that it's because I set the navigationBar to unhidden after I called self.navigationItem.rightBarItem.enable. Putting the latter after the former fixes the problem

回答3:

I ran into the same problem and solved it by declaring the normal-button-state without any colorinformation.

Swift example:

    myBtn.setTitleTextAttributes([NSFontAttributeName: UIFont(name: "xxx", size: 20.0)!, NSForegroundColorAttributeName: UIColor.whiteColor()], forState: UIControlState.Normal)
    myBtn.setTitleTextAttributes([NSFontAttributeName: UIFont(name: "xxx", size: 20.0)!, NSForegroundColorAttributeName: UIColor.darkGrayColor()], forState: UIControlState.Disabled)

just becomes

    myBtn.setTitleTextAttributes([NSFontAttributeName: UIFont(name: "xxx", size: 20.0)!], forState: UIControlState.Normal)

I'm not sure but I think it was because I declared also a tintColor in XCode.

来源：https://stackoverflow.com/questions/22550045/text-color-of-disabled-uibarbuttonitem-is-always-the-color-of-the-normal-state

标签

ios

uibarbuttonitem