iOS 修改通讯录联系人地址（address）崩溃原因分析

浏览数：28 / 时间：2015年06月11日

目前项目中需要对iOS系统通讯录进行读取，修改操作。在进行对地址修改的时候，出现了一个奇怪现象：

● 如果contact没有address字段（或者一个全新的contact），对它的address进行修改是可以成功的，

● 如果这个人有过address字段，此时对它就行修改就崩溃。控制台打出：

*** -[CFString release]: message sent to deallocated instance 0x81d26f0

这应该是一个僵尸对象，重复释放某一个对象。首先我对修改通讯录的代码进行检查，但是没发现问题，下面是代码

[objc] view plain copy

//设置地址
ABMutableMultiValueRef multiAddress = ABMultiValueCreateMutable(kABMultiDictionaryPropertyType);
for (PhoneTypePair* p in contact.addressArr) {
//内容判断空
if ([p.content length]==0) {
continue;
}
NSMutableDictionary *addressDictionary = [[NSMutableDictionary alloc] init];
//把地址只写入street字段中
[addressDictionary setObject:[p.content mutableCopy] forKey:(NSString *)kABPersonAddressStreetKey];
[addressDictionary setObject:@"" forKey:(NSString *)kABPersonAddressCityKey];
[addressDictionary setObject:@"" forKey:(NSString *)kABPersonAddressStateKey];
[addressDictionary setObject:@"" forKey:(NSString *)kABPersonAddressZIPKey];
[addressDictionary setObject:@"" forKey:(NSString *)kABPersonAddressCountryCodeKey];
//将字典放入多值对象中
if ([p.type isEqualToString:kAddressType_Work]) {
ABMultiValueAddValueAndLabel(multiAddress, CFBridgingRetain(addressDictionary), kABWorkLabel, NULL);
}else if ([p.type isEqualToString:kAddressType_Home]){
ABMultiValueAddValueAndLabel(multiAddress, CFBridgingRetain(addressDictionary), kABHomeLabel, NULL);
}else{
ABMultiValueAddValueAndLabel(multiAddress, CFBridgingRetain(addressDictionary), kABOtherLabel, NULL);
}
}
ABRecordSetValue(person, kABPersonAddressProperty, multiAddress, NULL);
ABAddressBookAddRecord(addressBook, person, nil);
ABAddressBookSave(addressBook, NULL);
if (multiAddress) {
CFRelease(multiAddress);
}

程序崩溃在 ABAddressBookSave(addressBook, NULL); 百思不得其解，google上查阅了很多资料，看看是不是“多值”的对象使用错了，还是代码顺序的问题。都没有结果。

后来，我想起来了Instruments这个工具，可以查看僵尸对象。立即起profile。结果如下：

Zombie的地方是ABCMultiValueDestroy。但是，我注意到了AddressBookEngine的getAddress:函数。突然我恍然大悟，应该读取的时候CF和OC对象转换的问题。随机，我打开网址，转向ARC说明

__bridge只做类型转换，但是不修改对象（内存）管理权；
__bridge_retained（也可以使用CFBridgingRetain）将Objective-C的对象转换为Core Foundation的对象，同时将对象（内存）的管理权交给我们，后续需要使用CFRelease或者相关方法来释放对象；
__bridge_transfer（也可以使用CFBridgingRelease）将Core Foundation的对象转换为Objective-C的对象，同时将对象（内存）的管理权交给ARC。

那么问题，应该就在读取address的地方了：看代码

[objc] view plain copy

/**
* 获取地址
*
* @param recordRef 通讯录单个联系人引用
*
* @return 地址
*/
-(NSDictionary*) getAddress:(ABRecordRef)recordRef{
//1.判定
if (recordRef == nil) {
return nil;
}
NSMutableArray *addressHome = [[NSMutableArray alloc]init];
NSMutableArray *addressWork = [[NSMutableArray alloc]init];
NSMutableArray *other = [[NSMutableArray alloc]init];
//2.创建字典，获取多键值列表
NSMutableDictionary *multiValueDic = [[NSMutableDictionary alloc] initWithCapacity:1];
ABMultiValueRef multiValueArr = ABRecordCopyValue(recordRef, kABPersonAddressProperty);
//3.将多值，封装到字典中。
int count = multiValueArr ? ABMultiValueGetCount(multiValueArr) : 0 ;
if (count > 0) {
count = (count <= kMaxAddressNumber?count:kMaxAddressNumber);
for(int i = 0; i < count; i++) {
@autoreleasepool {
//lable
//注意桥接,将CF对象转成OC对象。ARC下，自动释放OC对象:参考http://blog.csdn.net/hherima/article/details/16356577
NSString* label = CFBridgingRelease(ABMultiValueCopyLabelAtIndex(multiValueArr,i));
//value
CFDictionaryRef dict = ABMultiValueCopyValueAtIndex(multiValueArr, i);
NSString* street =CFBridgingRelease( CFDictionaryGetValue(dict, kABPersonAddressStreetKey));
NSString* city =CFBridgingRelease( CFDictionaryGetValue(dict, kABPersonAddressCityKey));
NSString* country =CFBridgingRelease(CFDictionaryGetValue(dict, kABPersonAddressCountryKey));
//CFRelease(dict);//应该删除
NSString *syntheticAddress = [NSString stringWithFormat:@"%@%@%@"
,(street?street:@"")
,(city?city:@"")
,(country?country:@"")];
if (label == nil || [label isEqualToString:@"_$!<Home>!$_"]){
[addressHome addObject:syntheticAddress];
}
else if([label isEqualToString:@"_$!<Work>!$_"]){
[addressWork addObject:syntheticAddress];
}
else{
[other addObject:syntheticAddress];
}
}
}
[multiValueDic setObject:addressHome forKey:@(EAdressBookType_AddressHome)];
[multiValueDic setObject:addressWork forKey:@(EAdressBookType_AddressWork)];
[multiValueDic setObject:other forKey:@(EAdressBookType_AddressOther)];
}
//4.释放CF对象
if (NULL != multiValueArr) {
CFRelease(multiValueArr);
multiValueArr = NULL;
}
return multiValueDic;
}