iOS通讯录导入崩溃异常类型: EXC_BAD_ACCESS (SIGSEGV)
<p><p>首先简要介绍一下背景，我聘请了一名开发人员来构建我的应用程序，但我知道通过剖析现有代码可以更好地学习，因此我的目标是通过这种方式了解更多有关 iOS 编程的知识，而不是花钱请开发人员来修复。</p >
<p>现在，当我将通讯录中的联系人导入应用程序时，应用程序崩溃了。我注意到当我从 iOS Facebook 联系人而不是其他联系人组导入联系人时，应用程序崩溃。这可能是什么原因造成的？</p>
<pre><code>Exception Type:EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
Triggered by Thread:0
Thread 0 name:Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
</code></pre>
<p>研究告诉我，该应用正在尝试调用它无法访问但不确定从这里去哪里的东西。</p>
<p>这是我认为导致问题的代码区域。 (这个 Action )。</p>
<pre><code>-(void)peoplePickerNavigationControllerDidCancel:(ABPeoplePickerNavigationController *)peoplePicker{
;
}
-(BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person{
_arrContactsData =[ init];
NSMutableDictionary *contactInfoDict = [
initWithObjects:@[@"", @"", @"", @"", @"", @"", @"", @"", @""]
forKeys:@[@"firstName", @"lastName", @"mobileNumber", @"homeNumber", @"homeEmail", @"workEmail", @"address", @"zipCode", @"city"]];
// Use a general Core Foundation object.
CFTypeRef generalCFObject = ABRecordCopyValue(person, kABPersonFirstNameProperty);
// Get the first name.
if (generalCFObject) {
;
CFRelease(generalCFObject);
}
// Get the last name.
generalCFObject = ABRecordCopyValue(person, kABPersonLastNameProperty);
if (generalCFObject) {
;
CFRelease(generalCFObject);
}
// Get the phone numbers as a multi-value property.
ABMultiValueRef phonesRef = ABRecordCopyValue(person, kABPersonPhoneProperty);
for (int i=0; i<ABMultiValueGetCount(phonesRef); i++) {
CFStringRef currentPhoneLabel = ABMultiValueCopyLabelAtIndex(phonesRef, i);
CFStringRef currentPhoneValue = ABMultiValueCopyValueAtIndex(phonesRef, i);
if (CFStringCompare(currentPhoneLabel, kABPersonPhoneMobileLabel, 0) == kCFCompareEqualTo) {
;
}
if (CFStringCompare(currentPhoneLabel, kABHomeLabel, 0) == kCFCompareEqualTo) {
;
}
CFRelease(currentPhoneLabel);
CFRelease(currentPhoneValue);
}
CFRelease(phonesRef);
// Get the e-mail addresses as a multi-value property.
ABMultiValueRef emailsRef = ABRecordCopyValue(person, kABPersonEmailProperty);
for (int i=0; i<ABMultiValueGetCount(emailsRef); i++) {
CFStringRef currentEmailLabel = ABMultiValueCopyLabelAtIndex(emailsRef, i);
CFStringRef currentEmailValue = ABMultiValueCopyValueAtIndex(emailsRef, i);
if (CFStringCompare(currentEmailLabel, kABHomeLabel, 0) == kCFCompareEqualTo) {
;
}
if (CFStringCompare(currentEmailLabel, kABWorkLabel, 0) == kCFCompareEqualTo) {
;
}
CFRelease(currentEmailLabel);
CFRelease(currentEmailValue);
}
CFRelease(emailsRef);
// Get the first street address among all addresses of the selected contact.
ABMultiValueRef addressRef = ABRecordCopyValue(person, kABPersonAddressProperty);
if (ABMultiValueGetCount(addressRef) > 0) {
NSDictionary *addressDict = (__bridge NSDictionary *)ABMultiValueCopyValueAtIndex(addressRef, 0);
forKey:@"address"];
forKey:@"zipCode"];
forKey:@"city"];
}
CFRelease(addressRef);
// If the contact has an image then get it too.
if (ABPersonHasImageData(person)) {
NSData *contactImageData = (__bridge NSData *)ABPersonCopyImageDataWithFormat(person, kABPersonImageFormatThumbnail);
;
}
// Initialize the array if it's not yet initialized.
if (_arrContactsData == nil) {
_arrContactsData = [ init];
}
// Add the dictionary to the array.
;
// Reload the table view data.
// Dismiss the address book view controller.
;
NSDictionary *info = ;
self.txfFirstName.text = ;
self.txfLastName.text = ;
self.txfMobile.text =;
self.txfEmail.text =;
NSLog(@"Info %@",info);
return NO;
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>看起来 Facebook 在地址簿中为其电子邮件联系人添加了奇怪的标签，因此当您查询标签时，它会返回一个 nil 值，这会给您带来错误的访问错误和崩溃</p>
<p>我个人在它周围放了一个 if 语句，只是忽略了所有 nil 地址，因为无论如何我只想要工作地址，请参阅代码中的以下示例(我没有检查过，但它应该可以工作)</p>
<p>在“分析”我之前的回答后，我注意到它实际上报告了内存泄漏，所以我将 if 移动了一点，并且更新的代码在它下面消失了。</p>
<pre><code>for (int i=0; i<ABMultiValueGetCount(emailsRef); i++) {
CFStringRef currentEmailLabel = ABMultiValueCopyLabelAtIndex(emailsRef, i);
CFStringRef currentEmailValue = ABMultiValueCopyValueAtIndex(emailsRef, i);
if (currentEmailLabel != nil) {
if (CFStringCompare(currentEmailLabel, kABWorkLabel, 0) == kCFCompareEqualTo) {
;
}
CFRelease(currentEmailLabel);
}
CFRelease(currentEmailValue);
}
CFRelease(emailsRef);//END OF IF WRAPPER
</code></pre>
<p>如果您想要这些电子邮件并且不在乎它们是 Facebook，我想您可以对标签进行 nil 检查并重新标记它，或者完全忽略标签比较。</p></p>
<p style="font-size: 20px;">关于iOS通讯录导入崩溃异常类型: EXC_BAD_ACCESS (SIGSEGV)，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/24719058/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/24719058/
</a>
</p>
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