如何观察ABPersonView对ABPerson的更改

Question

我知道ABPersonView不是KVO的投诉对象。我的问题是，尽管每次访问属性时都保留了ABPersonView的声明属性，但我得到了不同的对象。我做错了什么吗?还是说每次ABPersonView发生变化，我都必须用新的ABPerson对象更新模型？使用埃尔卡皮坦通用汽车公司。

ABPersonView：

@property (readwrite, retain) ABPerson *person;
// An ABPerson record for display.
// Raises if person originates from ABAddressBook's +sharedAddressBook.
// Person must be exist in an ABAddressBook created and manipulated on the main thread only.
// When person is nil, displays an empty selection state. 

代码：

#import "AppDelegate.h"
@import AddressBook;
static void * ABPersonVCContext = &ABPersonVCContext;

@interface AppDelegate ()

@property (weak) IBOutlet NSWindow *window;
@property (strong) ABPerson *person;
@property (strong) ABPersonView *personView;
@property (strong) ABAddressBook *book;
@property (assign, getter=isEditing) BOOL editing;
@property NSTimer *timer;
@end

@implementation AppDelegate

- (instancetype)init {
  self = [super init];
  if (self) {
    _book = [[ABAddressBook alloc] init];
    NSString *vCardRepresentation = @"BEGIN:VCARD\r\nVERSION:3.0\r\nN:AA;BB;;;\r\nFN:\r\nEND:VCARD\r\n";
    NSData *vCardData = [vCardRepresentation dataUsingEncoding:NSUTF8StringEncoding];
    _person = [[ABPerson alloc] initWithVCardRepresentation:vCardData];
    [_book addRecord:_person];
    [self addObserver:self forKeyPath:@"editing"
              options:NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew
              context:ABPersonVCContext];
#ifdef DEBUG
    NSLog(@"%s %d %s", __FILE__, __LINE__, __PRETTY_FUNCTION__);
    NSLog(@"%@",_person);
#endif
  }
  return self;
}

- (void)awakeFromNib
{
  self.personView = [[ABPersonView alloc] initWithFrame:self.window.contentView.frame];
  self.personView.person = self.person;
  [self.window.contentView addSubview:self.personView];
  self.timer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(reverseEditing) userInfo:NULL repeats:YES];
  [self.timer fire];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
  if (context == ABPersonVCContext) {
    if ([keyPath isEqualTo:@"editing"]) {
#ifdef DEBUG
      NSLog(@"%s %d %s", __FILE__, __LINE__, __PRETTY_FUNCTION__);
      NSLog(@"%@",self.personView.person);
#endif
    }
  } else {
    @try {
      [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
    @catch (NSException *exception) {
      ;
    }
    @finally {
      ;
    }
  }
}

- (void)reverseEditing
{
  self.editing = !self.editing;
}

@end

编辑:新对象来自不同的addressBook实例：

(lldb) po [newPerson addressBook]
<ABAddressBook: 0x6080000d50e0>

(lldb) po self.book
<ABAddressBook: 0x6080000c4130>

(lldb) po [self.person addressBook]
<ABAddressBook: 0x6080000c4130>

EDIT2:即使注册通知也没有帮助，因为正在修改不同的对象。

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(changeOccured:) name:kABDatabaseChangedNotification object:nil];
[nc addObserver:self selector:@selector(changeOccured:) name:kABDatabaseChangedExternallyNotification object:nil];

Answer 1

不幸的是，每次调用personView的person属性都会触发将CNContact转换为ABPerson的ABPersonViewAPIAdapter。因此，如果不想在El Capitan上使用CNContact，他必须将经过编辑的ABPerson传播回模型对象。

您可以尝试使用以下代码(希望这将为某人节省一些时间)

  NSLog(@"%@",[self.personView performSelector:@selector(addressBook) withObject:nil]);
  NSLog(@"%@",[self.personView performSelector:@selector(_APIAdapter) withObject:nil]);
  NSLog(@"%@",[self.personView performSelector:@selector(_contact) withObject:nil]);