如何在Swift中导入现有的Objective C类 [英] How to import existing Objective C classes in Swift

问题描述

我曾经在XCode 6.0 DP中使用Swift一段时间，在我现有的项目中使用它。
我试图从我的ViewController.swift文件中访问MyModel.h（我现有的Objective C Model对象）。我想将

I had been messing around with Swift for a while in XCode 6.0 DP to use it in my existing project. I am trying to access MyModel.h(My existing Objective C Model object) from my ViewController.swift file. I wanted to import

#importMyModel.h导入我的Swift文件。
但是我找不到如何做到这一点。

#import "MyModel.h" to my Swift file. But I could not find how this can be done.

推荐答案

如果某人面临同样的问题，可以发布答案。

Posting the answer if it helps some one facing the same issue.

我发现在iOS Developer Library中提供了一个非常直接的解决方案。请参考以下链接：

I found that a pretty straight forward solution for How to do this is given in the iOS Developer Library. Please refer to the following link:

https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/MixandMatch.html#/ / apple_ref / doc / uid / TP40014216-CH10-XID_75

Apple Doc说：

Apple Doc says:

要在与
Swift代码相同的应用程序目标中导入一组Objective-C文件，您需要使用Objective-C桥接头将这些
文件公开给Swift。当您将
Swift文件添加到现有的Objective-C应用程序或将Objective-C文件添加到
现有的Swift应用程序时，Xcode可以创建此头文件。

To import a set of Objective-C files in the same app target as your Swift code, you rely on an Objective-C bridging header to expose those files to Swift. Xcode offers to create this header file when you add a Swift file to an existing Objective-C app, or an Objective-C file to an existing Swift app.

所以我创建了 MyApp-Bridging-Header.h 文件并添加了以下行：

So I created MyApp-Bridging-Header.h file and just added the following line:

#import "MyModel.h"

现在它允许我在我的 ViewController.swift 中使用该模型，如下所示：

Now it lets me use the model in my ViewController.swift as follows:

var myModel = MyModel()
myModel.name = "My name"
myModel.dobString = "11 March,2013"
println ("my model values: Name: \myModel.name and dob: \myModel.dobString")

对于任何人正试图解决这个问题。如果必须从头开始创建桥接文件，还必须在Build Settings> Swift Compiler> Objective-C Bridging Header中指定它的路径。

FYI to anyone who is trying to figure this out. If you have to create the bridging file from scratch, you also have to specify a path to it in Build Settings > Swift Compiler > Objective-C Bridging Header.

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