问调用web服务时io6应用程序崩溃

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This method not calling 
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
-(void)connectionDidFinishLoading:(NSURLConnection *)connection

and here below crash log have you see:

        libicucore.A.dylib`ucol_getVersion:
        0x30f92570:  ldr.w  r2, [r0, #204]
        0x30f92574:  cbnz   r2, 0x30f925ae            ; ucol_getVersion + 62
        0x30f92576:  ldr    r2, [r0, #36]
        0x30f92578:  movs   r3, #56
        0x30f9257a:  ldrb.w r2, [r2, #68]
        0x30f9257e:  orr.w  r3, r3, r2, lsr #2
        0x30f92582:  lsls   r2, r2, #6
        0x30f92584:  strb   r3, [r1]
        0x30f92586:  strb   r2, [r1, #1]
        0x30f92588:  ldr    r2, [r0, #36]
        0x30f9258a:  ldrb.w r2, [r2, #69]
        0x30f9258e:  strb   r2, [r1, #2]
        0x30f92590:  ldr    r0, [r0, #32]
        0x30f92592:  cbz    r0, 0x30f925a8            ; ucol_getVersion + 56
        0x30f92594:  ldr    r2, [r0, #36]
        0x30f92596:  ldrb.w r0, [r2, #72]
        0x30f9259a:  ldrb.w r2, [r2, #73]