IOS-Swift and Object-C Mixed Programming, ios-object-c

IOS-Swift and Object-C Mixed Programming, ios-object-c
1. preface facts prove that Swift cannot replace Object-C in a short time, and .... the Apple Swift development team said, "We'll recommend people start with Swift, sure, but ObjC isn' t going anywhere. our goal's to work with the platform, not reinvent. "Well, Apple's official attitude towards Swift and ObjC is very clear. Be prepared to learn two languages at the same time. the first thing we need to do is the mixed programming of the two languages. Today, let's get started with-2. swift calls Object-C Code 2. 1. create a Swift project 2. 2. create an Object-C class. Whether to create an ObjectOC bridge headerThen, select YES. Here we are sure to create the file, and then write a simple method 2. 3. Import the header file of the OC file in the bridge file.If the file is not imported, no prompt will be displayed in the Swift file and cannot be called.2. 4. create an object in the Swift file and run the sayhello method successfully. 3. object-C calls Swift code 3. 1. create an Object-C project 3. 2. if you create a Swift class, it will still show whether you need to create a header for the OC bridge. Then, select YES. Here we are sure to create 2. 3. bridge File

This is different from the OC call by Swift. Pay attention to the following:

This is required by Swift to call the OC language. Here we use OC to call the Swift language, so we do not need to import the Swift file in this bridge file._____________ Why? Because while creating it, xcode also creates a hidden file This hidden file is our benchmark for calling the Swift language by OC. So what is its name?  "Project name" + "-" + "Swift". hWe need to import this hidden file in the OC class, though we can't see it, but it actually exists. 2. 4. Create an object in the OC file and run Note: After the OC creates an object, --When a method is called, there is no prompt, or even an error is reported. If this method cannot be found, we don't have to worry about it. Running the command directly proves that the operation is successful, and the error message will disappear. For example, the sayhello method is successfully called. thank you. If you have any questions, please comment on them. I have time to reply! Author: Clear Saup
Source: http://www.cnblogs.com/qingche/
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