thread 1:exc_bad_access(code=1,address=0x70000008) 怎么确定问题?
程序奔溃的日志
libobjc.A.dylib`objc_msgSend:
0x33786f68: teq.w r0, #0x0
0x33786f6c: beq 0x33786faa ; objc_msgSend + 66
0x33786f6e: push.w {r3, r4}
0x33786f72: ldr r4, [r0]
0x33786f74: lsr.w r9, r1, #0x2
0x33786f78: ldr r3, [r4, #0x8]
0x33786f7a: add.w r3, r3, #0x8
0x33786f7e: ldr r12, [r3, #-8]
0x33786f82: and.w r9, r9, r12
0x33786f86: ldr.w r4, [r3, r9, lsl #2]
0x33786f8a: teq.w r4, #0x0
0x33786f8e: add.w r9, r9, #0x1
0x33786f92: beq 0x33786fa6 ; objc_msgSend + 62
0x33786f94: ldr.w r12, [r4]
0x33786f98: teq.w r1, r12
0x33786f9c: bne 0x33786f7e ; objc_msgSend + 22
0x33786f9e: ldr.w r12, [r4, #8]
0x33786fa2: pop {r3, r4}
0x33786fa4: bx r12
0x33786fa6: pop {r3, r4}
0x33786fa8: b 0x33786fb0 ; objc_msgSend_uncached
0x33786faa: mov.w r1, #0x0
0x33786fae: bx lr