On the first attempt to add an existing Swift file to a Swift only Xcode project it states that adding this file will 'create a mixed Objective-C and Swift project' and asks 'Would you like to configure an Objective-C bridging header?'On the first attempt to add an existing Swift f
阅读背景：
可以对“你想配置Objective-C桥接头部吗？”说“不”吗？什么时候第一次添加现有的Swift文件？
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