Working with view controllers(Chapter 5 of The iPhone™ Developer’s Cookbook)

 
    1  
   #import  
   < 
   UIKit 
   / 
   UIKit.h 
   > 
   
 
    2  
   
 
    3  
    
   #define 
    COOKBOOK_PURPLE_COLOR    [UIColor colorWithRed:0.20392f green:0.19607f blue:0.61176f alpha:1.0f] 
   
 
    4  
    
   #define 
    BARBUTTON(TITLE, SELECTOR)     [[[UIBarButtonItem alloc] initWithTitle:TITLE style:UIBarButtonItemStylePlain target:self action:SELECTOR] autorelease] 
   
 
    5  
   
 
    6  
   @interface TestBedViewController : UIViewController
 
    7  
   @end
 
    8  
   
 
    9  
   @implementation TestBedViewController
 
   10  
   
 
   11  
    
   // 
    Return an exhaustive descent of the view's subviews 
   
 
   12  
    
   NSArray  
   * 
   allSubviews(UIView  
   * 
   aView)
 
   13  
   {
 
   14  
       NSArray  
   * 
   results  
   = 
    [aView subviews];
 
   15  
        
   for 
    (UIView  
   * 
   eachView  
   in 
    [aView subviews])
 
   16  
       {
 
   17  
           NSArray  
   * 
   riz  
   = 
    allSubviews(eachView);
 
   18  
            
   if 
    (riz) results  
   = 
    [results arrayByAddingObjectsFromArray:riz];
 
   19  
       }
 
   20  
        
   return 
    results;
 
   21  
   }
 
   22  
   
 
   23  
    
   - 
   ( 
   void 
   ) segmentAction: (UISegmentedControl  
   * 
   ) sender
 
   24  
   {
 
   25  
        
   // 
    Update the label with the segment number 
   
 
   26  
    
       UILabel  
   * 
   label  
   = 
    (UILabel  
   * 
   )[self.view viewWithTag: 
   101 
   ];
 
   27  
       [label setText:[NSString stringWithFormat: 
   @" 
   %0d 
   " 
   , sender.selectedSegmentIndex  
   + 
     
   1 
   ]];
 
   28  
   }
 
   29  
   
 
   30  
    
   - 
    ( 
   void 
   ) loadView
 
   31  
   {
 
   32  
       self.view  
   = 
    [[[NSBundle mainBundle] loadNibNamed: 
   @" 
   mainview 
   " 
    owner:self options:nil] lastObject];
 
   33  
       self.navigationController.navigationBar.tintColor  
   = 
    COOKBOOK_PURPLE_COLOR;
 
   34  
       
 
   35  
        
   // 
    Create the segmented control. Choose one of the three styles 
   
 
   36  
    
       NSArray  
   * 
   buttonNames  
   = 
    [NSArray arrayWithObjects: 
   @" 
   One 
   " 
   ,  
   @" 
   Two 
   " 
   ,  
   @" 
   Three 
   " 
   ,  
   @" 
   Four 
   " 
   ,  
   @" 
   Five 
   " 
   ,  
   @" 
   Six 
   " 
   , nil];
 
   37  
       UISegmentedControl 
   * 
    segmentedControl  
   = 
    [[UISegmentedControl alloc] initWithItems:buttonNames];
 
   38  
       segmentedControl.segmentedControlStyle  
   = 
    UISegmentedControlStyleBar; 
 
   39  
       [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
 
   40  
   
 
   41  
    
   // 
    For menus, the momentary behavior is preferred. Otherwise, the segmented control
 
   42  
    
   // 
    provides a radio-button style interface 
   
 
   43  
    
   #define 
    TESTWITHMOMENTARY        1 
   
 
   44  
       
 
   45  
    
   #if 
    TESTWITHMOMENTARY == 1 
   
 
   46  
       segmentedControl.momentary  
   = 
    YES;
 
   47  
    
   #else 
   
 
   48  
       segmentedControl.momentary  
   = 
    NO;
 
   49  
       segmentedControl.selectedSegmentIndex  
   = 
     
   0 
   ;
 
   50  
    
   #endif 
   
 
   51  
       
 
   52  
       CFShow(allSubviews(segmentedControl));
 
   53  
   
 
   54  
   
 
   55  
        
   // 
    Add it to the navigation bar 
   
 
   56  
    
       self.navigationItem.titleView  
   = 
    segmentedControl;
 
   57  
       [segmentedControl release];
 
   58  
   }
 
   59  
   @end
 
   60  
   
 
   61  
   @interface TestBedAppDelegate : NSObject  
   < 
   UIApplicationDelegate 
   > 
   
 
   62  
   @end
 
   63  
   
 
   64  
   @implementation TestBedAppDelegate
 
   65  
    
   - 
    ( 
   void 
   )applicationDidFinishLaunching:(UIApplication  
   * 
   )application {    
 
   66  
       UIWindow  
   * 
   window  
   = 
    [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
 
   67  
       UINavigationController  
   * 
   nav  
   = 
    [[UINavigationController alloc] initWithRootViewController:[[TestBedViewController alloc] init]];
 
   68  
       [window addSubview:nav.view];
 
   69  
       [window makeKeyAndVisible];
 
   70  
   }
 
   71  
   @end
 
   72  
   
 
   73  
    
   int 
    main( 
   int 
    argc,  
   char 
     
   * 
   argv[])
 
   74  
   {
 
   75  
       NSAutoreleasePool  
   * 
    pool  
   = 
    [[NSAutoreleasePool alloc] init];
 
   76  
        
   int 
    retVal  
   = 
    UIApplicationMain(argc, argv, nil,  
   @" 
   TestBedAppDelegate 
   " 
   );
 
   77  
       [pool release];
 
   78  
        
   return 
    retVal;
 
   79  
   }
 
   80