我的应用程序崩溃了，我需要一些建议来查找和解决问题。这不是设备或电缆问题，因为它会发生在所有设备上，而不仅仅是在调试时。 Xcode 不会在异常断点处停止，应用程序只是简单地停止运行而没有错误信息。调试 xcode 时仅显示“与 X 的 iPhone 失去连接”。我有来自设备的以下日志，请参阅 MY_CRASHING_APP:
Incident Identifier: 85730E97-BA21-4C72-8AD1-02075A8FD9A7
CrashReporter Key: d9e9eb14ac1801fea11e662a394244d7caf29154
Hardware Model: iPhone4,1
OS Version: iPhone OS 8.0 (12A365)
Kernel Version: Darwin Kernel Version 14.0.0: Tue Aug 19 15:08:02 PDT 2014; root:xnu-2783.1.72~8/RELEASE_ARM_S5L8940X
Date: 2014-09-24 15:02:41 +0200
Time since snapshot: 325 ms
Free pages: 20793
Active pages: 20412
Inactive pages: 10678
Speculative pages: 1757
Throttled pages: 55906
Purgeable pages: 699
Wired pages: 21196
File-backed pages: 30263
Anonymous pages: 2584
Compressions: 76385
Decompressions: 3948
Compressor Size: 81
Uncompressed Pages in Compressor: 61
Page Size: 4096
Largest process: MY_CRASHING_APP
Processes
Name | <UUID> | CPU Time| rpages| purgeable| recent_max| lifetime_max| fds | [reason] | (state)
coreduetd <675ac3d39b193f9bba42896818431859> 0.049 124 0 - 391 50 [vnode-limit] (daemon) (idle)
homed <77bcbc47e2723e269b0ff9d115658259> 0.052 146 0 - 458 50 [vnode-limit] (daemon) (idle)
gamed <a51b1ad16b693a75aeaaf2166e7b1b0b> 0.049 38 0 - 74 50 [vnode-limit] (daemon) (idle)
lsd <72b4494834d3357bb8aa32fd5b5c8e83> 0.068 161 0 - 368 50 [vnode-limit] (daemon)
InCallService <88e149874b1c35f2b8adbeee958d7258> 18.461 1289 0 - 3238 50 [vnode-limit] (resume) (continuous)
MY_CRASHING_APP <1542054cd5393df29827ca1a6bd34e04> 59.116 24504 600 - 29490 1600 [vnode-limit] (frontmost) (resume)
ptpd <c0bc1e573edb3bcebea0f3140a139421> 3.442 878 0 - 1634 50 (daemon)
BTServer <1b7372b3ae393847b1c3ccaa720e991e> 3.057 393 0 - 1437 50 (daemon)
lockdownd <bb602fb4b5ac3b51af2d22c4fdce9778> 11.306 271 0 - 761 50 (daemon)
imagent <01ebc2c08d7f36059714967efaa86e78> 19.892 585 0 - 1286 50 (daemon)
locationd <9727e24fbe4f357cb27d7bc8cf882c93> 489.694 1665 0 - 3586 50 (daemon)
identityservices <13c2b979d6433252a011087be05e1aa5> 22.999 696 0 +2 1585 50 (daemon)
discoveryd <dff5d0d2edf43b45b0c7fbd4a3e1b677> 93.758 589 0 - 1077 100 (daemon)
wifid <5fb79228aa653a9bb725217b9cb891e6> 63.420 571 0 - 1098 50 (daemon)
iaptransportd <ae70565455de38f3aab8993e9d109207> 7.713 306 0 - 579 50 (daemon)
mediaserverd <b5ba58774a853d43a17559ae76a6f918> 649.476 1025 64 - 6134 50 (daemon)
syslogd <a5a138dc01cd34d19bbe336c03099ce7> 40.100 201 0 - 384 50 (daemon)
powerd <b3163caaebd53f7aa42634836472ea04> 43.199 231 0 - 474 50 (daemon)
apsd <17af2320ccfb3e668b6455b95b4612ce> 37.461 631 0 - 1445 50 (daemon)
networkd <a657abe0ce803333b886876a8f7a36e0> 77.271 596 0 - 1297 50 (daemon)
dataaccessd <db655c44d5c830dc9e5f34f7edcb17a4> 243.259 1777 0 - 3097 100 (daemon)
vmd <88cebb23d0f1344db23e1896b1787f2d> 0.505 204 0 - 617 50 (daemon)
iapd <e84bb9b7cf7530babc36c6ca37b7f345> 11.963 453 0 - 1673 50 (daemon)
syslog_relay <9e18dbcbcc07374e9d14c732b8dabad2> 1.424 98 0 - 189 50 (daemon)
voiced <2d24fa3e32533f2f8298743eaf348d63> 0.179 210 0 - 581 50 (daemon)
itunesstored <d50d5b1c3f693694a2eee878aae8facf> 0.573 908 0 - 1759 50 (daemon)
SpringBoard <3e0aacaca7103aa09a71e5c9fee3e012> 841.081 7088 29 - 16912 50
backboardd <117d65aca8ce3ba68c7fd87d9ab81da6> 3424.058 6678 625 - 4409 50 (daemon)
UserEventAgent <2f6c74a697943aed899faebac621e4c3> 316.816 848 0 - 2101 200 (daemon)
configd <64e4db8bced23463b446c4b7c868fcfa> 31.906 416 0 - 933 50 (daemon)
fseventsd <a393d343a7533860b5c1eddb922a33f1> 20.088 405 0 - 805 50 (daemon)
fairplayd.H1 <c3856f0573fb3f9887721a239507f28b> 30.647 159 0 - 1096 50 (daemon)
assertiond <032107d4db2b36ddac986060d8c62f73> 26.282 289 0 - 702 50 (daemon)
wirelessproxd <ba82fe3b38f63f2b8b8807a2bf97aadd> 1.071 179 0 - 643 50 (daemon)
distnoted <e8f9e76e751838a880dad2d4a953f814> 4.457 193 0 - 254 50 (daemon)
discoveryd_helpe <84abc0c6dd5b37a8b2c8323881e16da7> 0.493 123 0 - 466 50 (daemon)
ubd <5f4f0054821e3b41b543a4d9f4176291> 9.040 730 0 - 1540 50 (daemon)
filecoordination <68a3848887853629adae42f5828a5443> 2.731 251 0 - 649 100 (daemon)
aggregated <ab0d307a392f36cc827709d24c4b8696> 1335.558 1081 0 - 1688 50 (daemon)
DTMobileIS <086152f142ac30a686a172b148d38fbc> 109.156 474 0 - 1724 50 (daemon)
touchsetupd <d8aabe65f2d23f6ab7704bbccc6c2ba1> 0.388 158 0 - 464 50 (daemon)
cfprefsd <6e5dcfe209183c719091d07edad590da> 0.150 166 0 - 320 50 (daemon)
accountsd <9eb0309b021033c6b24ce65da48fa228> 0.665 595 0 - 1909 50 (daemon)
CommCenter <0e1ced0eddce346ba27e9f54886ef025> 669.306 1543 0 - 4623 50 (daemon)
notifyd <7beaf472572334d4989a40473776f635> 61.698 272 0 - 309 50 (daemon)
ReportCrash <b36d5780860a3dfcbb146b2cc6bca339> 0.062 146 0 - 443 50 (daemon)
**End**
更新:
原来是内存问题。该应用程序很快分配了大量内存，操作系统终止了该应用程序。奇怪的是，Xcode 没有记录内存警告，而在 Instruments 中显示该应用程序收到了很多警告。使用相同内存量的其他应用程序没有内存警告。我的猜测是那些没有以如此快的速度分配内存。
该应用程序在 iPhone 4S 上运行，并在大约 90MB 内存使用时被杀死。
令我困惑的是其他内存不足问题都有 Purgeable pages: 0。所以我猜这不完全是内存不足，而是短时间内内存使用过多？
最佳答案
只是为其他在这方面苦苦挣扎的人提供帮助。
对我来说，解决方案是重启我的设备。
关于iOS 应用程序崩溃，xcode 在调试时显示 'Lost connection to X' s iPhone'，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26020832/