iphone - Objective-C 通讯录

Question

我有两个继承自 UIViewController 的 Objective-C 类，我正在尝试一种不同的方法来学习如何与 iPhone 的地址簿进行交互。 example Apple 假设一切都在一个类中，但这不是我需要的方式。我的目标是在选择一个人后关闭地址簿 View 。请看一下，让我知道如何在没有 CallerClass 实现 ABPeoplePickerNavigationControllerDelegate 的情况下完成此操作。谢谢!

-- 编辑--

它似乎归结为 [self dismissModalViewControllerAnimated:YES];在 CalleeClass.m 中没有任何影响。我似乎仍然无法通过此命令获得关闭地址簿的 react 。

调用者类.m

#import "CallerClass.h"

@implementation CallerClass
- (IBAction)openAddressBook {
    CalleeClass *cc = [[CalleeClass alloc] init];
    [self presentModalViewController:[cc doIt] animated:YES];
}

被调用类.h

#import <UIKit/UIKit.h>
#import <AddressBook/AddressBook.h>
#import <AddressBookUI/AddressBookUI.h>

@interface CalleeClass : UIViewController <ABPeoplePickerNavigationControllerDelegate> {
    NSString *name;
}

-(ABPeoplePickerNavigationController *)doIt;

@property (nontoxic, retain) NSString *name;

@end

被调用类.m

#import <UIKit/UIKit.h>
#import <AddressBook/AddressBook.h>
#import <AddressBookUI/AddressBookUI.h>
#import "CalleeClass.h"

@implementation CalleeClass
@synthesize name;

…(在所列内容之外的默认 ABPeoplePickerNaviationControllerDelegate 实现)

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {}
    return self;
}

- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person {
    self.name = (NSString *)ABRecordCopyValue(person,kABPersonAddressProperty);

    [self dismissModalViewControllerAnimated:YES];
    return NO;  
}

-(ABPeoplePickerNavigationController *)doIt {
    ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController alloc] init];
    picker.peoplePickerDelegate = self;
    return picker;
}

@end

Answer 1

如果问题是，如您所说，如果从 CalleeClass 调用，[self dismissModalViewControllerAnimated:YES] 没有效果，这是因为 dismissModalViewControllerAnimated: 必须在呈现 View Controller 上调用(即，您调用 presentModalViewController:Animated: 的 View Controller 。因为您没有对 CallerClass 的引用CalleeClass 中的实例，这不起作用。

幸运的是，dismissModalViewControllerAnimated: 的文档指出:

If you call this method on the modal view controller itself, however, the modal view controller automatically forwards the message to its parent view controller.

所以这应该可行:

- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person {
    self.name = (NSString *)ABRecordCopyValue(person,kABPersonAddressProperty);
    [peoplePicker dismissModalViewControllerAnimated:YES];
    return NO;  
}