Cannot find protocol declaration for 'xxx'

在OC项目中使用swift时,遇到Cannot find protocol declaration for 'xxx'时,可能需要在桥接文件中import相应的头文件,比如:Cannot find protocol declaration for 'SKPaymentTransactionObserver'Cannot find protocol declaration for 'SKProductsRequestDelegate',我需要在桥接文件中添加#import <StoreKit/StoreKit.h>,再编译就通过了.

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