在 ABPeoplePickerNavigationController 中设置提示

Question

我无法获取此代码来设置提示：

// Create a PeoplePicker
ABPeoplePickerNavigationController *objPeoplePicker = [[ABPeoplePickerNavigationController alloc] init];
[objPeoplePicker setPeoplePickerDelegate:self];

// Customize colors
objPeoplePicker.topViewController.navigationController.navigationBar.tintColor = [UIColor colorWithRed:0.294 green:0.278 blue:0.247 alpha:1.0];
objPeoplePicker.topViewController.searchDisplayController.searchBar.tintColor = [UIColor colorWithRed:0.294 green:0.278 blue:0.247 alpha:1.0];

// Only display phone numbers
NSArray *displayedItems = [NSArray arrayWithObjects:[NSNumber numberWithInt:kABPersonPhoneProperty], nil];
objPeoplePicker.displayedProperties = displayedItems;

// Add a prompt
objPeoplePicker.navigationBar.topItem.prompt = @"Choose a contact to...";

// Show the picker
[self presentModalViewController:objPeoplePicker animated:YES];

“添加提示”部分似乎没有设置提示。有什么想法吗？以下是输出的屏幕截图：

Answer 1

这个问题的关键信息（不太明显）是您需要在该行之后设置提示：

[self presentModalViewController:objPeoplePicker animated:YES];

因此，如果您这样做，它就会起作用：

[self presentModalViewController:objPeoplePicker animated:YES];
objPeoplePicker.navigationBar.topItem.prompt = @"Choose a contact to...";