问题背景
flutter agconnect_crash-1.2.0+300 运行在ios平台上，出现了如下这个崩溃
NSInvalidArgumentException: *** +[NSJSONSerialization dataWithJSONObject:options:error:]: value parameter is nil
0 CoreFoundation 0x00000001830d005c 0x183037000 + 626780
1 libobic.A.dylib Ox000000019b5eaf54 0x19b5d5000 + 89940
2 Foundation 0x00000001848d5eac 0x184861000 + 478892
3 Runner-[AGCCrashCustomLogger filterLogArrayWithMaxSize:]
4 Runner -[AGCCrashCustomLogger logWithLevel:message:]
5 Runner -[AGCCrash logWithLevel:message:]
6 Runner-[AGConnectCrashPlugin handleMethodCall:result:] AGConnectCrashPlugin.m:66
7 Flutter Ox0000000104603c54 0x104114000 + 5176404
8 Flutter Ox0000000104150664 0x104114000 + 247396
9 Flutter 0x00000001044d0204 0x104114000 + 3916292
10 Flutter 0x00000001043#0d8 0x104114000 + 3059928
11 Flutter 0x00000001044026a4 0x104114000 + 3073700
12 CoreFoundation0x00000001830e5278 0x183037000 + 713336
13 CoreFoundation Ox0000000183069c50 0x183037000 + 207952
14 CoreFoundation0x000000018306444c 0x183037000 + 185420
15 CoreFoundation0x0000000183042c68 0x183037000 + 48232
16 CoreFoundation0x00000001830563c8 0x183037000 + 127944
17 GraphicsServices 0x00000001986738c 0x19e866000 + 5004
18 UIKitCore 0x00000001859fcObc 0x1854e 1000 + 5353660
19 UlKitCore 0x0000000185779be8 0x1854e 1000 + 2722792
20 Runner _main AppDelegate.swift:5
21 (null) 0x0000000103861a24 0x0 + 4354087460
解决该问题
这个问题产生的原因是Flutter插件依赖的版本号太低了。您可以手动修改下crash插件里的podspec，把ios SDK升级到1.4版本，platform也可以修改成9.0：
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