'release' is unavailable: not available in automatic reference counting mode..:
单击项目,选择"Build Settings",搜索"Objective - C Automatic Reference Counting",选择 NO
Cannot creat __weak reference in file using manual reference counting
Settings -> Apple LLVM 7.1 - Language - Objective C -> Weak References in Manual Retain Release to YES.
运行时报错-Verify the Developer App certificate for youraccount
is trusted on your device. Open Settings on Mayoyi_sakura and
navigate to General -> Device Management, then select your
解决方法：打开手机设置->通用->设备管理，找到编辑工程时的ID资料，点击允许即可。
