按步骤已经做到最后一步了：
codesign -f -s "iPhone Developer: xx xx (GTRWCGP736)" --entitlements Entitlements.plist WeChat.app
然后验证WeChat.app
codesign -vv -d WeChat.app
Executable=/Users/tinkl/pojieWeChat/WeChat.app/WeChat
Identifier=com.tencent.xin.xy
Format=bundle with Mach-O universal (armv7 arm64)
CodeDirectory v=20100 size=214947 flags=0x0(none) hashes=10739+5 location=embedded
WeChat.app: no signature
Info.plist=not bound
TeamIdentifier=not set
Sealed Resources version=2 rules=12 files=2809
Internal requirements count=1 size=96实在是不知道问题在哪儿