按住页面 的 选项卡 ，像打游戏 一样， 就崩溃了。
因为 一个界面的 加载数据 方法，放在 viewWillAppear.
又因为，两行代码 的缓存 设置 似乎 有些问题
objc[9990]: Class SSKeychain is implemented in both /System/Library/PrivateFrameworks/StoreServices.framework/StoreServices (0x1b0c384b0) and /var/containers/Bundle/Application/5F0C2FD3-CDAE-4ED4-900F-BAAD56F6983D/TheStep.app/TheStep (0x10055be50). One of the two will be used. Which one is undefined.
2017-01-20 20:35:25.035476 TheStep[9990:3151184] [DYMTLInitPlatform] platform initialization successful
2017-01-20 20:35:27.552590 TheStep[9990:3151166] | JIGUANG | I - [JIGUANGService]
--------------------------- JPush Log ----------------------------
--------------------JPush SDK Version:3.0.0--build:13----------
--------------------JCore Lib Version:1.0.0------------
-----------------AppKey:72bbf5b21080a540b02992ef----------------
2017-01-20 20:35:27.554008 TheStep[9990:3151166] | JIGUANG | I - [JIGUANGClientController] Action - jpush setup
2017-01-20 20:35:27.559349 TheStep[9990:3151166] | JIGUANG | I - [JIGUANGClientController] Action - setup
2017-01-20 20:35:29.089754 TheStep[9990:3151195] | JIGUANG | I - [JIGUANGSessionController] connecting with coreAddr 121.46.20.45,port 7004
2017-01-20 20:35:29.338677 TheStep[9990:3151221] | JIGUANG | I - [JIGUANGLogin]
----- login result -----
uid:8001100181
registrationID:141fe1da9ea4a1c90d0
2017-01-20 20:35:40.354521 TheStep[9990:3151045] [MC] System group container for systemgroup.com.apple.configurationprofiles path is /private/var/containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles
2017-01-20 20:35:40.368514 TheStep[9990:3151045] [MC] Reading from public effective user settings.
2017-01-20 20:35:58.440338 TheStep[9990:3151045] Can't find keyplane that supports type 4 for keyboard iPhone-PortraitChoco-NumberPad; using 1316927560_PortraitChoco_iPhone-Simple-Pad_Default
2017-01-20 20:36:26.414027 TheStep[9990:3151045] Cannot snapshot view (<UIKeyboardImpl: 0x129de6b10; frame = (0 0; 375 216); layer = <CALayer: 0x17042ba00>>) with afterScreenUpdates:NO, because the view is not in a window. Use afterScreenUpdates:YES.
2017-01-20 20:38:14.062341 TheStep[9990:3151045] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'
*** First throw call stack:
(0x18c7111b8 0x18b14855c 0x18c5ec71c 0x1000d2c20 0x192909b58 0x192909d88 0x1928f7320 0x19290edec 0x1926aade8 0x1925c3a80 0x18fa719d8 0x18fa664cc 0x18fa6638c 0x18f9e33e0 0x18fa0aa68 0x18fa0b488 0x18c6be0c0 0x18c6bbcf0 0x18c6bc180 0x18c5ea2b8 0x18e09e198 0x1926317fc 0x19262c534 0x10013b014 0x18b5cd5b8)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
