iphone - 程序收到 Exc_bad_access 信号并崩溃

Question

访问用户通讯录时出现问题。我的代码是

ABMultiValueRef email = ABRecordCopyValue(aSource, kABPersonEmailProperty);
        NSString* email_lbl;
        for(CFIndex i = 0; i < ABMultiValueGetCount(email); i++) {
            email_lbl = (NSString*)ABMultiValueCopyLabelAtIndex(email, i);
            if([email_lbl isEqualToString:(NSString *)kABHomeLabel])
            {
               home_email = [(NSString*)ABMultiValueCopyValueAtIndex(email, i)retain];
            }
            if([email_lbl isEqualToString:(NSString *)kABWorkLabel])
            {
               work_email = [(NSString*)ABMultiValueCopyValueAtIndex(email, i)retain];
            }
            if([email_lbl isEqualToString:(NSString *)kABOtherLabel])
            {
                basic_email = [(NSString*)ABMultiValueCopyValueAtIndex(email, i)retain];
            }

        }

登录 home_email、work_email、basic_email 时收到 Exc_bad_access 信号。

Answer 1

我自己找到了解决方案。我声明了 home_email、work_email、basic_email 但没有初始化它们，当我在日志中打印它们时，它们还没有初始化。这解决了我的问题。