iphone - Objective-C程序收到信号: "EXC_BAD_ACCESS" push notifications

Question

我已经编写 Objective-C 代码整整两天了。我遇到这个问题:

//Notification methods
- (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
    NSLog(@"didRegisterForRemoteNotificationsWithDeviceToken started with %@", deviceToken);   
    const void *devTokenBytes = [deviceToken bytes];
    self->registered = YES;
    //NSLog(@"didRegisterForRemoteNotificationsWithDeviceToken ended with %@", devTokenBytes);  
    [self sendProviderDeviceToken:devTokenBytes];
}

- (void) application:(UIApplication *)app didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
    NSLog(@"didFailToRegisterForRemoteNotificationsWithError started with %@", error);  
}

- (BOOL)sendProviderDeviceToken:(void *)deviceToken
{

    //NSLog(@"sendProviderDeviceToken started with %@", deviceToken);   
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://some_url//pushRegistration"]];
    NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys:deviceToken, @"registrationId", @"06d746d0-e67e-11e0-911d-c42c0322474a", @"authenticationToken", @"apns", @"type", nil];

    NSError *theError = NULL;
    NSData *theData = [[CJSONSerializer serializer] serializeObject:dict error:&theError];
    NSData *requestData = [NSData dataWithBytes:[theData bytes] length:[theData length]];

    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody: requestData];

    NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse: nil error: nil ];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding: NSUTF8StringEncoding];

    NSLog(@"returnData: %@", returnString);   

    return YES;
}

您可能认识 Apple 开发中心的这个示例。问题是当我尝试在 sendProviderDeviceToken 方法中引用 deviceToken 时收到 EXC_BAD_ACCESS 信号。

我做错了什么？

Answer 1

设备 token 也可以用作字符串(下面的代码片段来 self 的一个实时项目)，

- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken
{
    NSLog(@"My token is: %@", deviceToken);

    NSString *strDeviceToken = [[NSString alloc]initWithFormat:@"%@",[[[deviceToken description]
                                                          stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]] 
                                                         stringByReplacingOccurrencesOfString:@" " 
                                                         withString:@""]];
    NSLog(@"%@",strDeviceToken);

    [self sendProviderDeviceToken:strDeviceToken];

}

从此更改方法签名

- (BOOL)sendProviderDeviceToken:(void *)deviceToken

到

- (BOOL)sendProviderDeviceToken:(NSString *)deviceToken