相关疑难解决方法(0)

我想知道是否有人使用SFHFKeychainUtils设法修改它们以兼容ARC.更确切地说

NSDictionary *attributeResult = NULL;
NSMutableDictionary *attributeQuery = [query mutableCopy];
[attributeQuery setObject: (id) kCFBooleanTrue forKey:(__bridge id) kSecReturnAttributes];
OSStatus status = SecItemCopyMatching((CFDictionaryRef) attributeQuery,(CFTypeRef *)(attributeResult));

我试过了

OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef) attributeQuery,(CFTypeRef *)(attributeResult));

也

CFTypeRef subAttributeResult = (CFTypeRef *)(objc_unretainedPointer(attributeResult));
OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef) attributeQuery,(CFTypeRef *)(subAttributeResult));

这2个是我设法得到的唯一两种方法没有错误.通过在这里添加objc_XXX而不是CFTypeRef来实现任何其他方法并且在那里得到错误(从ARC中禁止从obj-c指针到CFTypeRef的隐式转换,将x参数传递给y参数丢弃限定符).显然,第一段代码也会出错.虽然构建时没有出现任何错误,但在到达此部分代码时,应用程序会因EXC_BAD_ACCESS而崩溃.

完整SFHFKeychainUtils的链接:https://github.com/ldandersen/scifihifi-iphone/tree/master/security

有什么帮助吗？谢谢.

我在SecItemCopyMatching上发现了内存泄漏.经过对SF的调查,我找到了解决方案:

__block NSString *certificateName = nil;
SecKeychainRef keychain;
SecKeychainCopyDefault(&keychain);
NSMutableDictionary *attributeQuery = [NSMutableDictionary dictionary];
[attributeQuery setObject: (id) kSecClassIdentity forKey:(__bridge_transfer id) kSecClass];
[attributeQuery setObject: (id) kCFBooleanTrue forKey:(__bridge_transfer id) kSecReturnRef];
[attributeQuery setObject: (id) kSecMatchLimitAll forKey:(__bridge_transfer id) kSecMatchLimit];
CFTypeRef attrResult = NULL;
OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef) attributeQuery,(CFTypeRef *) &attrResult);<------- here is a leak according Instruments


if (status != errSecItemNotFound) {
    NSArray *attributeResult = (__bridge_transfer NSArray *)attrResult;
    [attributeResult enumerateObjectsUsingBlock:^(id identityFromArray, NSUInteger idx, BOOL *stop) {
        OSStatus status;
        SecCertificateRef cert = NULL;
        status = …