Objective C Класс может не отвечать на methord

Question

Я новичок в Objective C, и я пытался создать образец программы самостоятельно. Когда я скомпилировал код на своей машине Linux, я получил достаточное количество предупреждений и был скомпилирован. Но удивительно, что у меня нет выхода, вместо этого у меня появилось много сообщений. Описание код был приведен ниже

Метод Декларация

@interface AsciitoBinaryClass:NSObject 
    /* method declaration */ 
    - (int)AsciitoBinary: (char)d Num1:(int*)bin ; 
    @end 

Метод

@implementation AsciitoBinaryClass 
    /* method Convert Ascii to Binary */ 
    - (int)AsciitoBinary: (char)d Num1:(int*)bin{ 
     int len=0; 
     int a=d; 
     while(a>0) 
     { 
      bin[len]=a%2; 
      a/=2; 
      len++; 
     } 
     return len; 
    } 
@end 

Метод вызова от Main

AsciitoBinaryClass *asciitobinaryClass = [[AsciitoBinaryClass alloc]init]; 
    len = [asciitobinaryClass AsciitoBinary:a Num2:bin]; 

Компиляционном предупреждения приведены ниже

shameerariff@shameerariff-Lenovo-G460:~/study/c/crypt/objc$ gcc test.m -o test `gnustep-config --objc-flags` `gnustep-config --base-libs` 
test.m: In function ‘main’: 
test.m:35:2: warning: ‘AsciitoBinaryClass’ may not respond to ‘-AsciitoBinary:Num2:’ 
    len = [asciitobinaryClass AsciitoBinary:a Num2:bin]; 
^
test.m:35:2: warning: (Messages without a matching method signature 
test.m:35:2: warning: will be assumed to return ‘id’ and accept 
test.m:35:2: warning: ‘...’ as arguments.) 
test.m:35:6: warning: assignment makes integer from pointer without a cast [-Wint-conversion] 
    len = [asciitobinaryClass AsciitoBinary:a Num2:bin]; 
    ^
test.m:32:13: warning: variable ‘len’ set but not used [-Wunused-but-set-variable] 
    int bin[8],len=0; 

сообщений, во время выполнения

shameerariff@shameerariff-Lenovo-G460:~/study/c/crypt/objc$ ./test 
2016-05-03 15:25:02.600 test[22624] autorelease called without pool for object (0x2607270) of class GSCInlineString in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.616 test[22624] autorelease called without pool for object (0x2745330) of class NSException in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.616 test[22624] autorelease called without pool for object (0x2744530) of class NSLongLongNumber in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.616 test[22624] autorelease called without pool for object (0x2735790) of class NSLongLongNumber in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.617 test[22624] autorelease called without pool for object (0x2732dc0) of class NSLongLongNumber in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.617 test[22624] autorelease called without pool for object (0x2734260) of class NSLongLongNumber in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.617 test[22624] autorelease called without pool for object (0x26ae280) of class NSLongLongNumber in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.617 test[22624] autorelease called without pool for object (0x264c610) of class NSIntNumber in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.617 test[22624] autorelease called without pool for object (0x2653490) of class NSLongLongNumber in thread <NSThread: 0x2593270> 
2016-05-03 15:25:02.617 test[22624] autorelease called without pool for object (0x264af40) of class NSIntNumber in thread <NSThread: 0x2593270> 
./test: Uncaught exception NSInvalidArgumentException, reason: -[AsciitoBinaryClass AsciitoBinary:Num2:]: unrecognized selector sent to instance 0x2598520 
shameerariff@shameerariff-Lenovo-G460:~/study/c/crypt/objc$ 

Answer 1

Вы определили свой метод как:

- (int)AsciitoBinary: (char)d Num1:(int*)bin; 

И вы вызываете его as:

- (int)AsciitoBinary: (char)d Num2:(int*)bin ; 

AsciitoBinary:Num1: и AsciitoBinary:Num2: не имеет такого же стирания.

В вашей основной функции замены:

AsciitoBinaryClass *asciitobinaryClass = [[AsciitoBinaryClass alloc]init]; 
len = [asciitobinaryClass AsciitoBinary:a Num2:bin]; 

по

AsciitoBinaryClass *asciitobinaryClass = [[AsciitoBinaryClass alloc]init]; 
len = [asciitobinaryClass AsciitoBinary:a Num1:bin];