Custom code snippets of uitabbar

1. Custom tabbar tab background
By default, the tabbar background of uitabbarcontroller is black. How do I customize the background image?

Uitabbarcontroller * tabbarcontroller = [[uitabbarcontroller alloc] init]; // obtain all the subviews of the tab controller view and save them to an array. nsarray * array = [tabbarcontroller. view subviews]; // tabbaruitabbar * tabbar = [array objectatindex: 1]; // uiimage * image = [uiimage imagenamed: @ "tabbarbg.png"]; uiimage * image = [uiimage imagewithcontentsoffile: sourcepath]; tabbar. layer. contents = (ID) image. cgimage;

Or:

Tabbarcontroller = [[uitabbarcontroller alloc] init]; [tabbarcontroller setviewcontrollers: view_manager]; uiimageview * tab_imgv = [uiimageview alloc] initwithimage: [uiimage imagenamed: @ "done"]; tab_imgv.frame = cgrectmake (, 320,49); temperature = Hangzhou; // Why is atindex 1? See SDK [[tabbarcontroller tabbar] insertsubview: tab_imgv atindex: 1]; [tab_imgv release]. [view_manager release];

Or:

Uitabbarcontroller * tabbarcontroller = [[uitabbarcontroller alloc] init]; // initialize a rectangular View frame cgrect frame = cgrectmake (,); uiview * V = [[uiview alloc] initwithframe: frame]; // uses the image as the tiled color template. The initialization color is uiimage * IMG = [uiimage imagenamed: @ "tabbarbg.png"]; uicolor * color = [[uicolor alloc] initwithpatternimage: img]; // set the view background color v. backgroundcolor = color; // Insert the view to the bottom layer of the tab bar [tabbarcontroller. tabbar insertsubview: V atindex: 0]; tabbarcontroller. tabbar. opaque = yes; [color release]; [V release];

Alternatively, rewrite the init method in the uitabbarcontroller subclass to initialize

-(ID) Init {If (Self = [Super init]) {// method 1 uiimageview * imgv = [[uiimageview alloc] initwithimage: [uiimage imagenamed: @ "tabbarbg.png"]; imgv. frame = cgrectmake (0, 0, self. tabbar. frame. size. width, self. tabbar. frame. size. height); imgv. contentmode = uiviewcontentmodescaletofill; // imgv. frame = cgrectoffset (imgv. frame, 0, 1); [[self tabbar] insertsubview: imgv atindex: 0]; [imgv release]; // method 2 cgrect frame = cgrectmake (0, 0, self. view. bounds. size. width, 49); uiview * view = [[uiview alloc] initwithframe: frame]; uiimage * tabimage = [uiimage imagenamed: @ "tabbg.png"]; uicolor * color = [[uicolor alloc] initwithpatternimage: tabimage]; [view setbackgroundcolor: Color]; [color release]; [[self tabbar] insertsubview: View atindex: 0]; [view release] ;}}

Of course, it is most convenient to start with ios5. ios5 provides an API to set the background image of uitabbar and indicate the selected image.

UIImage *tabBackground = [[UIImage imageNamed:@"tab_bg.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];[[UITabBar appearance] setBackgroundImage:tabBackground];[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tab_select_indicator.png"]];

2. Hide tabbar Hide the system tabbar, but still occupies the position.

- (void)hideExsitingTabBar {    for(UIView *view in self.view.subviews)    {         if([view isKindOfClass:[UITabBar  class]])         {              view.hidden = YES;              break;          }     }}

Hide tabbar completely: for example, transfer a view with a tabbar controller to another new view without the tabbar of the previous view.

nextViewController.hidesBottomBarWhenPushed = YES;[self.navigationController pushViewController:nextViewController animated:NO];