Undefined symbol: _OBJC_CLASS_$_UTDevice
Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_UTDevice", referenced from:
objc-class-ref in AlipaySDK
ld: symbol(s) not found for architecture x86_64
报以上错误的话，只需要把支付宝Demo中的 AlipaySDK.framework 和 AlipaySDK.bundle替换掉就行
Demo下载地址：https://openhome.alipay.com/doc/sdkResPackageDownLoad.resource?code=639b8cd68566419fb01c1c45b77ab6a7
