Iphone用UINavigationController实现在两个页之间导航（上）(5)

@property (copy) NSString *city; //创建一个属性set/get方法 
@end 
//CityDetailViewController.h原代码结束 
  
//CityDetailViewController.m原代码开始 
#import "CityDetailViewController.h" 
@implementation CityDetailViewController //实现控制器类 
@synthesize city; //属性city变量 
  
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib. 
- (void)viewDidLoad { 
    cityName.text = city;//获取从前一个页面传来的数据 
    //创建一个系统添加按钮，按下后，调用视图控制器上的add方法 
    UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] 
       initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
       target:self action:@selector(add:)];// 调用视图控制器上的add方法 
    //设置为导航控制器控制条上的右边按钮 
self.navigationItem.rightBarButtonItem = rightButton; 
    [rightButton release]; 
    
    [super viewDidLoad]; 
} 
  
- (void)didReceiveMemoryWarning { 
    // Releases the view if it doesn't have a superview. 
    [super didReceiveMemoryWarning]; 
    // Release any cached data, images, etc that aren't in use. 
} 
- (void)viewDidUnload { 
    [super viewDidUnload]; 
    // Release any retained subviews of the main view. 
    // e.g. self.myOutlet = nil; 
} 
- (void)dealloc { 
    [super dealloc]; 
} 
@end 
//CityDetailViewController.m原代码结束