当我尝试使用AFNetworking从iOS（目标c）调用java / soap Web服务时，多次出现此错误：＆＃34; EXC_BAD_ACCESS＆＃34; 在0x71d678：ldr r0，[r4，＃0x68]。 但我注意到如果在iPhone上（特别是iphone 6或一般在iOS8上）我禁用WIFI，错误就消失了 我发布汇编代码
libdispatch.dylib`_dispatch_timers_run:
0x71d5f0: push {r4, r5, r6, r7, lr}
0x71d5f2: add r7, sp, #0xc
0x71d5f4: push.w {r8, r10, r11}
0x71d5f8: sub sp, #0x18
0x71d5fa: movs r6, #0x0
0x71d5fc: str r0, [sp]
0x71d5fe: movw r0, #0xa83e
0x71d602: movt r0, #0x1
0x71d606: add r0, pc
0x71d608: add.w r1, r0, r6, lsl #6
0x71d60c: ldr r0, [r1, #8]!
0x71d610: str r1, [sp, #0x14]
0x71d612: cmp r0, #0x0
0x71d614: beq.w 0x71d776 ; _dispatch_timers_run + 390
0x71d618: ubfx r4, r6, #0x2, #0x1
0x71d61c: ldr r5, [sp]
0x71d61e: cbz r5, 0x71d632 ; _dispatch_timers_run + 66
0x71d620: ldr.w r0, [r5, r4, lsl #3]
0x71d624: str r0, [sp, #0x10]
0x71d626: cbz r0, 0x71d632 ; _dispatch_timers_run + 66
0x71d628: add.w r0, r5, r4, lsl #3
0x71d62c: ldr r0, [r0, #0x4]
0x71d62e: str r0, [sp, #0xc]
0x71d630: b 0x71d664 ; _dispatch_timers_run + 116
0x71d632: cmp r4, #0x0
0x71d634: bne 0x71d63c ; _dispatch_timers_run + 76
0x71d636: bl 0x70df20 ; _dispatch_get_nanoseconds
0x71d63a: b 0x71d648 ; _dispatch_timers_run + 88
0x71d63c: cmp r4, #0x1
0x71d63e: str r0, [sp, #0x10]
0x71d640: str r0, [sp, #0xc]
0x71d642: bne 0x71d64c ; _dispatch_timers_run + 92
0x71d644: blx 0x72b380 ; symbol stub for: mach_absolute_time
0x71d648: str r0, [sp, #0x10]
0x71d64a: str r1, [sp, #0xc]
0x71d64c: cbz r5, 0x71d664 ; _dispatch_timers_run + 116
0x71d64e: ldr r0, [sp, #0x10]
0x71d650: ldr r1, [sp, #0xc]
0x71d652: str.w r0, [r5, r4, lsl #3]
0x71d656: add.w r0, r5, r4, lsl #3
0x71d65a: str r1, [r0, #0x4]
0x71d65c: b 0x71d664 ; _dispatch_timers_run + 116
0x71d65e: mov r0, r4
0x71d660: bl 0x71c5bc ; _dispatch_timers_update
0x71d664: ldr r0, [sp, #0x14]
0x71d666: ldr.w r10, [r0]
0x71d66a: cmp.w r10, #0x0
0x71d66e: beq.w 0x71d776 ; _dispatch_timers_run + 390
0x71d672: ldr.w r0, [r10, #8]
0x71d676: mvns r4, r0
0x71d678: ldr r0, [r4, #0x68]
0x71d67a: cmp r0, r6
0x71d67c: bne 0x71d65e ; _dispatch_timers_run + 110
0x71d67e: mov r8, r10
0x71d680: ldr r5, [r8, #24]!
0x71d684: ldr r2, [sp, #0x10]
0x71d686: ldr.w r11, [r8, #4]
0x71d68a: subs r0, r5, #0x1
0x71d68c: sbc r1, r11, #0x0
0x71d690: cmp r0, r2
0x71d692: mov.w r0, #0x0
0x71d696: it hs
0x71d698: movhs r0, #0x1
0x71d69a: ldr r2, [sp, #0xc]
0x71d69c: cmp r1, r2
0x71d69e: mov.w r1, #0x0
0x71d6a2: it hs
0x71d6a4: movhs r1, #0x1
0x71d6a6: it eq
0x71d6a8: moveq r1, r0
0x71d6aa: cmp r1, #0x0
0x71d6ac: bne 0x71d776 ; _dispatch_timers_run + 390
0x71d6ae: ldr r0, [r4, #0x1c]
0x71d6b0: cmp r0, #0x1
0x71d6b2: bhi 0x71d65e ; _dispatch_timers_run + 110
0x71d6b4: ldr r0, [r4, #0x70]
0x71d6b6: cmp r0, #0x0
0x71d6b8: bne 0x71d65e ; _dispatch_timers_run + 110
0x71d6ba: str r6, [sp, #0x4]
0x71d6bc: ldr.w r6, [r10, #48]
0x71d6c0: ldr.w r3, [r10, #52]
0x71d6c4: ldr r0, [sp, #0x10]
0x71d6c6: ldr r1, [sp, #0xc]
0x71d6c8: mov r2, r6
0x71d6ca: str r3, [sp, #0x8]
0x71d6cc: subs r0, r0, r5
0x71d6ce: sbc.w r1, r1, r11
0x71d6d2: blx 0x72b240 ; symbol stub for: __udivdi3
0x71d6d6: mov r9, r6
0x71d6d8: adds r6, r0, #0x1
0x71d6da: adc r12, r1, #0x0
0x71d6de: lsrs r1, r6, #0x1f
0x71d6e0: orr.w r1, r1, r12, lsl #1
0x71d6e4: movs r2, #0x0
0x71d6e6: mvn r3, #0x80000000
0x71d6ea: orr.w r1, r1, r12, lsr #31
0x71d6ee: cmp r1, #0x0
0x71d6f0: mov.w r1, #0x0
0x71d6f4: itt ne
0x71d6f6: movne.w r12, #0x0
0x71d6fa: mvnne r6, #0x80000000
0x71d6fe: cmp.w r9, #0xffffffff
0x71d702: it eq
0x71d704: moveq r1, #0x1
0x71d706: ldr r0, [sp, #0x8]
0x71d708: cmp r0, #0x0
0x71d70a: it lt
0x71d70c: movlt r2, #0x1
0x71d70e: cmp r0, r3
0x71d710: it eq
0x71d712: moveq r2, r1
0x71d714: mov r3, r0
0x71d716: cbnz r2, 0x71d73c ; _dispatch_timers_run + 332
0x71d718: umull r1, r2, r6, r9
0x71d71c: mla r2, r6, r3, r2
0x71d720: mla r0, r12, r9, r2
0x71d724: adds r2, r1, r5
0x71d726: adc.w r3, r0, r11
0x71d72a: strd r2, r3, [r8]
0x71d72e: ldrd r0, r1, [r10, #56]
0x71d732: adds r0, r0, r2
0x71d734: adcs r1, r3
0x71d736: strd r0, r1, [r10, #32]
0x71d73a: b 0x71d750 ; _dispatch_timers_run + 352
0x71d73c: mov.w r0, #0xffffffff
0x71d740: str.w r0, [r8]
0x71d744: str.w r0, [r8, #4]
0x71d748: str.w r0, [r8, #8]
0x71d74c: str.w r0, [r8, #12]
0x71d750: mov r0, r4
0x71d752: bl 0x71c5bc ; _dispatch_timers_update
0x71d756: ldr r0, [sp, #0x10]
0x71d758: ldr r1, [sp, #0xc]
0x71d75a: strd r0, r1, [r10, #40]
0x71d75e: ldrex r0, [r4, #0x70]
0x71d762: add r0, r6
0x71d764: strex r1, r0, [r4, #0x70]
0x71d768: cmp r1, #0x0
0x71d76a: bne 0x71d75e ; _dispatch_timers_run + 366
0x71d76c: mov r0, r4
0x71d76e: bl 0x715934 ; _dispatch_wakeup
0x71d772: ldr r6, [sp, #0x4]
0x71d774: b 0x71d664 ; _dispatch_timers_run + 116
0x71d776: adds r6, #0x1
0x71d778: cmp r6, #0x7
0x71d77a: bne.w 0x71d5fe ; _dispatch_timers_run + 14
0x71d77e: add sp, #0x18
0x71d780: pop.w {r8, r10, r11}
0x71d784: pop {r4, r5, r6, r7, pc}
0x71d786: nop
有人可以帮帮我吗？ 在iphone 4s上它还可以（iOS 7） 先感谢您 克劳迪奥