iOS5的 UIAppearance protocal能幹嘛呢？
這邊有篇中文的參考
想要整個 App 都套同一種客製的UI，就加在 AppDelegate 裡面就行囉！
- (
void)customUI
{
// Set the background image for *all* UINavigationBars
UIImage *navBG = [[UIImage imageNamed:@"navbar-iphone.png"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
[[UINavigationBar appearance] setBackgroundImage:navBG
forBarMetrics:UIBarMetricsDefault];
// Customize navigation bar back button
UIImage *navBackButtonBG = [[UIImage imageNamed:@"nav-back-button.png"]
resizableImageWithCapInsets:UIEdgeInsetsMake(5, 16, 5, 7)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:navBackButtonBG
forState:UIControlStateNormal
barMetrics:UIBarMetricsDefault];
// Customize navigation bar buttons
UIImage *navButtonBG = [[UIImage imageNamed:@"nav-button.png"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 5, 0, 5)];
[[UIBarButtonItem appearance] setBackgroundImage:navButtonBG forState:UIControlStateNormal
barMetrics:UIBarMetricsDefault];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
[self customUI];
return YES;
}
