如何在AddressBookUI应用程序中添加自定义栏按钮项到导航栏，如在取消位置进行编辑

Question

我不能理解为什么导航栏在下面的代码中除了取消按钮之外不添加任何按钮，这种事情是在Viber应用程序中完成的，所以它是可能的

 ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController     alloc] init];
picker.navigationBar.tintColor=[UIColor colorWithRed:91.0/256.0 green:72.0/256.0 blue:110.0/256.0 alpha:1.0];
//picker.navigationController.navigationBar.topItem.rightBarButtonItem = nil;
[picker.navigationBar setHidden:NO];
picker.peoplePickerDelegate = self;
// Display only a person's phone, email, and birthdate
NSArray *displayedItems = [NSArray arrayWithObjects:[NSNumber numberWithInt:kABPersonPhoneProperty], 
                           [NSNumber numberWithInt:kABPersonEmailProperty],
                           [NSNumber numberWithInt:kABPersonBirthdayProperty], nil];

//picker.navigationBarHidden=TRUE;
picker.displayedProperties = displayedItems;
//UIBarButtonItem *addbutton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(AddContact)];          
   //   picker.navigationController.navigationBar.topItem.rightBarButtonItem = addbutton;

[self presentModalViewController:picker animated:NO];
[picker release];
//[addbutton release];

有人能帮帮忙吗？

Answer 1

请参阅this文章，它演示了如何在ABPeoplePickerNavigationController上添加自定义按钮

Answer 2

我可以向你展示如何添加自定义按钮到导航栏。如果这是有帮助的，请使用此代码。

UIImage *buttonImage = [UIImage imageNamed:@"Done.png"];

    UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

    [aButton setImage:buttonImage forState:UIControlStateNormal];

    aButton.frame = CGRectMake(0.0, 0.0, buttonImage.size.width, buttonImage.size.height);

    UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aButton];

    [aButtonaddTarget:selfaction:@selector(navigatehome)forControlEvents:UIControlEventTouchUpInside];

    self.navigationItem.rightBarButtonItem = aBarButtonItem;

    [aBarButtonItem release];