type of property 'unsigned long long' in class extension does not match property type in primary class
failed to emit precompiled header '/Users/test/Library/Developer/Xcode/DerivedData/XCTestWD-fitwulywyznjwaedwmtjtcusxphl/Build/Intermediates.noindex/PrecompiledHeaders/XCTestWDUITests-Bridging-Header-swift_3JDT656EGFI5V-clang_3G7EJS98V6CLC.pch' for bridging header '/Users/test/Special_Test/Fastmonkey/temp/Fastmonkey/XCTestWD-master/XCTestWD/XCTestWDUITests/XCTestWDUITests-Bridging-Header.h'
使用xcode9会报错如下,请帮忙解决下,谢谢!