將後退按鈕添加到視圖控制器

Question

我已經爲我的3 UIToolBar項目創建了3 UIViewControllers，但我無法在每個控制器上創建一個按鈕，這會將我帶回主頁或主視圖控制器。請幫助我，因爲我是新的目標c。

這裏是我的代碼....

「ViewController.h」

#import "ViewController.h" 
#import "ContactInfoViewController.h" 
#import "DateViewController.h" 
#import "MessageViewController.h" 
@interface ViewController() 
@end 
@implementation ViewController 
- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
UIToolbar *toolbar = [[UIToolbar alloc] init]; 
toolbar.frame = CGRectMake(0, 417, self.view.frame.size.width, 44); 
UIBarButtonItem *contact = [[UIBarButtonItem alloc] initWithTitle:@"Contact" style:UIBarButtonItemStyleDone target:self action:@selector(ContactButton)]; 
UIBarButtonItem *flexiableItem1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil]; 
UIBarButtonItem *date = [[UIBarButtonItem alloc] initWithTitle:@"Date" style:UIBarButtonItemStyleDone target:self action:@selector(DateButton)]; 
UIBarButtonItem *flexiableItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil]; 
UIBarButtonItem *message = [[UIBarButtonItem alloc] initWithTitle:@"Message" style:UIBarButtonItemStyleDone target:self action:@selector(MessageButton)]; 
NSMutableArray *items = [[NSMutableArray alloc] initWithObjects:contact,flexiableItem1,date,flexiableItem,message, nil]; 
[toolbar setItems:items animated:YES]; 
[items release]; 
[self.view addSubview:toolbar]; 
[toolbar release]; 
} 
-(void)ContactButton 
{ 
ContactInfoViewController *secondViewcont = [[ContactInfoViewController alloc] init]; 
UINavigationController *navigCont = [[UINavigationController alloc] initWithRootViewController:secondViewcont]; 
[self presentViewController:navigCont animated:YES completion:nil]; 
} 
-(void)DateButton 
{ 
DateViewController *secondViewcont = [[DateViewController alloc] init]; 
UINavigationController *navigCont = [[UINavigationController alloc] initWithRootViewController:secondViewcont]; 
[self presentViewController:navigCont animated:YES completion:nil]; 
} 
-(void)MessageButton 
{ 
MessageViewController *secondViewcont = [[MessageViewController alloc] init]; 
UINavigationController *navigCont = [[UINavigationController alloc] initWithRootViewController:secondViewcont]; 
[self presentViewController:navigCont animated:YES completion:nil]; 
} 
- (void)didReceiveMemoryWarning 
{ 
[super didReceiveMemoryWarning]; 
} 
@end 

Answer 1

添加自定義按鈕，你的第二個視圖控制器

在viewDidLoad你可以做這樣的

self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneButtonPressed:)]autorelease]; 


- (IBAction)doneButtonPressed:(id)sender 
{ 
    [self dismissViewControllerAnimated:YES completion:nil]; 
}