Question

当我使用选择器注册成功和失败的回调时，我在使用asi-http-request时遇到了一个非常奇怪的错误。

使用以下方法：

//  Sets up a request and takes care of the stuff that needs to be for each
//  and every request.
- (void) setup:(NSString *) fragment successCallback:(SEL) success_callback failureCallback:(SEL) failure_callback {

  //  Convert the string to a url
  NSString *url = [[NSString alloc] initWithFormat:@"%@%@",
    self.server.serverUrl,
    fragment
  ];
  NSURL *full_url = [NSURL URLWithString: url];

  //  Time to setup the request
  self.curRequest = [ASIFormDataRequest requestWithURL:full_url];
 [self.curRequest setDelegate:self];
 [self.curRequest setDidFailSelector:success_callback];
 [self.curRequest setDidFinishSelector:failure_callback];

 //  If we're using iphone os version 4.0
 #if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
 [self.curRequest setShouldContinueWhenAppEntersBackground:YES];
 #endif

 //  Clean up time!
 [url release];
 [full_url release];

}

注册方法

- (void) register_user:(NSString *) email password:(NSString *) password confirmPassword:(NSString *) confirm_password successCallback:(SEL) success_callback failureCallback:(SEL) failure_callback {

[自我设置：@“/ users / register” successCallback：success_callback failureCallback：failure_callback ];

//设置方法的输入 [self.curRequest setPostValue：email forKey：@“email”]; [self.curRequest setPostValue：password forKey：@“password”]; [self.curRequest setPostValue：confirm_password forKey：@“confirm_password”];

NSLog（@“我们来到这里哟：）〜％@％@％@”，电子邮件，密码，confirm_password）;

[self.curRequest startAsynchronous]; }

成功和失败回调

- (void) registerSuccess: (ASIHTTPRequest *) request {
    NSString *response = [request responseString];
    NSLog(@"Response string: %s", response);
}

// Called when the http request fails. That means it could not
// reach the server for an unknown reason.
- (void) registerFailure: (ASIHTTPRequest *) request {
    NSError *error = [request error];
    NSLog(@"Register error: %s", [error localizedFailureReason]);
}

我调用了这样的寄存器方法：

[self.appdelegate.userModel register_user：self.emailAddress.text 密码：self.password.text confirmPassword：self.confirmPassword.text successCallback：@selector（registerSuccess :) failureCallback：@selector（registerFailure :) ];

来自gdb的callstack和错误：

2010-12-02 12:33:56.889 ProjectPrototype[2201:6003] -[__NSCFType absoluteURL]: unrecognized selector sent to instance 0x6457c60
2010-12-02 12:33:56.891 ProjectPrototype[2201:6003] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType absoluteURL]: unrecognized selector sent to instance 0x6457c60'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x0292eb99 __exceptionPreprocess + 185
    1   libobjc.A.dylib                     0x02a7e40e objc_exception_throw + 47
    2   CoreFoundation                      0x029306ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
    3   CoreFoundation                      0x028a02b6 ___forwarding___ + 966
    4   CoreFoundation                      0x0289fe72 _CF_forwarding_prep_0 + 50
    5   CoreFoundation                      0x02843b04 CFURLCopyAbsoluteURL + 100
    6   CFNetwork                           0x023fe5e8 _ZN11HTTPMessage10initializeEPK10__CFStringPK7__CFURLS2_ + 52
    7   CFNetwork                           0x023fe50c CFHTTPMessageCreateRequest + 80
    8   ProjectPrototype                    0x00011360 -[ASIHTTPRequest main] + 852
    9   Foundation                          0x000c83ca __NSThreadPerformPerform + 251
    10  CoreFoundation                      0x0290ffaf __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
    11  CoreFoundation                      0x0286e39b __CFRunLoopDoSources0 + 571
    12  CoreFoundation                      0x0286d896 __CFRunLoopRun + 470
    13  CoreFoundation                      0x0286d350 CFRunLoopRunSpecific + 208
    14  CoreFoundation                      0x02870614 CFRunLoopRun + 84
    15  ProjectPrototype                    0x00023b55 +[ASIHTTPRequest runRequests] + 173
    16  Foundation                          0x000b376c -[NSThread main] + 81
    17  Foundation                          0x000b36f8 __NSThread__main__ + 1387
    18  libSystem.B.dylib                   0x9689881d _pthread_start + 345
    19  libSystem.B.dylib                   0x968986a2 thread_start + 34
)
terminate called after throwing an instance of 'NSException'

我感谢任何和所有的帮助，非常感谢：）〜

Answer 1

Dudester你有两个严重的语法问题：

首先，每次使用都是错误的：

self.curRequest

仅限第一次 您设置了请求，请使用self.request = blah。

之后，只需使用[curRequest xyz]

第二个严重问题，

[self.curRequest setDidFailSelector:success_callback];
[self.curRequest setDidFinishSelector:failure_callback];

你忘记了'选择器'位，看起来应该更像这样：

[request setDidFinishSelector:@selector(blahCommuniqueDone:)];
[request setDidFailSelector:@selector(blahCommuniqueDoneProblem:)];

（也要小心冒号。）忘记尝试将它们作为SEL传递。这两个例程就在同一个对象中。你只需指向它们。

这是一个典型的完整工作示例。如果你这样做，你将没有问题。这三个例程只是将放在同一个文件中。

-(void) blahCommunique
    {
    // it sends the string blah for pid (even if blank)
    // from V5 it sends the blah as well ..

    NSURL *url = [NSURL URLWithString:@"https://blah?blah"];
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];

    [request setPostValue:blahAA forKey:@"blahAA"];
    [request setPostValue:blahBB forKey:@"blahBB"];// new in V5

    [request setPostValue:SIMPLESTRINGTHISVERSION forKey:@"version"];

#define QQ(a) [NSString stringWithFormat:@"%d", a]

    [request setPostValue:QQ(vfourblahCount) forKey:@"cr"];
    [request setPostValue:QQ(vfourblahCount) forKey:@"sb"];
    [request setPostValue:QQ(vfourblahCount) forKey:@"so"];
    [request setPostValue:QQ(vfourblahCount) forKey:@"lc"];
    [request setPostValue:QQ(OLDlaunchCount) forKey:@"olc"];

#undef QQ

    [request setPostValue:[[NSLocale preferredLanguages] objectAtIndex:0] forKey:@"langpref"];

    [request setDelegate:self];
    [request setDidFinishSelector:@selector(statsCommuniqueDone:)];
    [request setDidFailSelector:@selector(statsCommuniqueDoneProblem:)];

    [request startAsynchronous];
    }

-(void) statsCommuniqueDone:(ASIHTTPRequest *)request
    {
    NSData *newStringData = [request responseData];//todo, check [incomingFloatData length]

    self.factoryMessageIfAny =
        [[[NSString alloc] initWithData:newStringData encoding:NSUTF8StringEncoding] autorelease];

    if ( [self.factoryMessageIfAny isEqualToString:@"OK"] )
        self.factoryMessageIfAny = @"";
    }
-(void) statsCommuniqueDoneProblem:(ASIHTTPRequest *)request
    {
    // statsCommuniqueDoneProblem ... !
    self.factoryMessageIfAny = @"";
    }

asi-http-request异步选择器错误

1 个答案: