OC与Swift混编，对swift单元测试常见error

1、error "ProjectName-Swift.h" file not found

在单测的target中，Header Search Paths中添加

"$(TARGET_TEMP_DIR)/../$(PROJECT_NAME).build/DerivedSources"

2、bridging header warning

Implicit import of bridging header 'ProjectName-Bridging-Header.h' via module 'ProjectName' is deprecated and will be removed in a later version of Swift

在ProjectNameTests-Bridging-Header.h中引入#import "ProjectName-Bridging-Header.h"即可

3、error Cannot find 'ClassName' in scope

当前测试用例中使用，@testable  import  ProjectName