去掉原文

Author: StormXX

issue-13/Swift视频录制开发指南.md

@@ -1,91 +1,49 @@
 # Swift视频录制开发指南 
-======================================================
+===
 
 > * 原文链接 : [Take Video Tutorial in iOS8 with Swift](http://www.ioscreator.com/tutorials/take-video-tutorial-ios8-swift)
 * 原文作者 : [ioscreator](www.ioscreator.com)
 * [译文出自 :  开发技术前线 www.devtf.cn](http://www.devtf.cn)
 * 译者 : [Mr.Simple](https://github.com/bboyfeiyu) 
-* 校对者: []() 
-
-Apple provides the UIImagePickerController which is an user interface to
-take videos using the built-in camera of an iOS device. In this tutorial
-we will take a video which will be saved in the Photo Library of the
-device. This tutorial is built in iOS 8.4 and Xcode 6.4。
+* 校对者: [StormXX](https://github.com/StormXX) 
 
 Apple提供了一个UIImagePickerController用户界面类来让用户使用内置的摄像头来拍摄视频。我的开发环境是iOS 8.4和xcode 6.4，在这篇文章中我会教大家获取已经存储在Photo Library的视频。
 
-Open Xcode and create a new Single View Application. For product name,
-use **IOS8SwiftTakeVideoPlayerTutorial** and then fill out the
-Organization Name and Organization Identifier with your customary
-values. Enter Swift as Language and make sure only iPhone is selected in
-Devices.
-
 首先打开Xcode，然后创建一个名为IOS8SwiftTakeVideoPlayerTutorial的应用，Organization名和Organization标识符使用你自己的即可。选择Swift作为开发语言，并且该应用只支持Iphone。
 
 ![](http://static1.squarespace.com/static/52428a0ae4b0c4a5c2a2cede/t/559ce50ee4b0560c42b45099/1436345615076/)
 
-Go to the **Storyboard** and drag two buttons from the Object Library to
-the main view. Give the buttons a title of "Take Video" and "View
-Library". The storyboard should look like this.
-
 到Storyboard页面，从Object Library拖两个按钮到主视图上，给这两个按钮设置title,分别为"Take Video" 和 "View Library"，Storyboard此时应该如下图所示: 
 
 ![](http://static1.squarespace.com/static/52428a0ae4b0c4a5c2a2cede/t/559ce595e4b0cebfa4eee243/1436345750826/)
 
-Hold down the Ctrl key and select both buttons. Click the "Resolve Auto
-Layout Issues" button on the bottom-right of the Storyboard and select
-"Add Missing Constraints".
-
 按住Ctrl键，然后选中这两个按钮，点击在Storyboard右下方的“Resolve Auto Layout Issues”按钮，然后选择“Add Missing Constraints”。如下图所示 : 
 
-
 ![](http://static1.squarespace.com/static/52428a0ae4b0c4a5c2a2cede/t/559ce604e4b04c3e89ff0e2e/1436345862940/)
 
-
-Select the Assistant Editor and make sure
-the **ViewController.swift** is visible. Ctrl and drag from the top
-Button and create the following Action.
-
 切换到Assistant Editor界面，并且确保ViewController.swift是可见的。按住Ctrl并从Take Video按钮区域拖出以创建一个Action.
 
 ![](http://static1.squarespace.com/static/52428a0ae4b0c4a5c2a2cede/t/559ce655e4b051cc74e74388/1436345942333/)
 
-
-Ctrl and drag from the bottom Button and create the following Action.
-
 同样的，按住按住Ctrl并从View Library按钮区域拖出以创建一个Action。
 
-
 ![](http://static1.squarespace.com/static/52428a0ae4b0c4a5c2a2cede/t/559ce67fe4b001bba4e7e8e9/1436345984380/)
 
-
-Go to the ViewController.swfit file and add the following lines at the
-top off the file.
-
 切换到ViewController.swfit文件，在文件的头部添加如下代码。
 
-
-```swift
+```
 import MobileCoreServices
 import AssetsLibrary
 ```
 
-
-Change the ViewController class declaration line to
-
 修改ViewController类的定义如下 : 
 
-
-```swift
-class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
-```
-
-These delegates are needed to let the ViewController handle the
-UIImagePickerController delegation. Implement the **takeVideo** method
+`class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
+`
 
 这些delegates使得ViewController能够处理UIImagePickerController的代理事件，takeVideo的实现如下 : 
 
-```swift
+```
 @IBAction func takeVideo(sender: AnyObject) {
     // 1 Check if project runs on a device with camera available
     if UIImagePickerController.isSourceTypeAvailable(.Camera) {
@@ -104,22 +62,12 @@ UIImagePickerController delegation. Implement the **takeVideo** method
 }
 ```
 
-
-1.  The isSourceTypeAvailable method checks if the device supports the
-    Camera sourceType
-2.  An ImagePickerController is displayed using the Camera Sourcetype
-    and the Movie mediaType. The maximum length of a movie is set to 10
-    seconds,
-
 1. isSourceTypeAvailable函数是检测设备的Camera是否可用；
 2. ImagePickerController用于显示Sourcetype为Camera、mediaType为Movie的视频，视频的最大长度为10秒。
 
-Implement the **viewLibrary** method.
-
 viewLibrary的实现 : 
 
-
-```swift
+```
 @IBAction func viewLibrary(sender: AnyObject) {
             // Display Photo Library
             controller.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
@@ -130,13 +78,9 @@ viewLibrary的实现 :
     }
 ```
 
-The Photo library is displayed. If the mediaType isn't set to the movie
-type, the video files will not be displayed. Next, the delegate methods
-of the UIImagePickerControllerDelegate protocol needs to be implemented.
-
 在调用上述代码之后，Photo library就会被显示。如果mediaType没有设置为Movie类型，视频文件就不会被显示出来。下一步就是实现UIImagePickerControllerDelegate协议的方法 : 
 
-```swift
+```
 func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject: AnyObject]) {
     // 1    
     let mediaType:AnyObject? = info[UIImagePickerControllerMediaType]
@@ -166,46 +110,23 @@ func imagePickerController(picker: UIImagePickerController, didFinishPickingMedi
 }
 ```
 
-The **imagePickerController(\_:didFinishPickingMediaWithInfo:)** method
-tells the delegate the user picked a movie. The info parameter contains
-the URL of the picked movie.
-
 当用户选择了一个视频时`imagePickerController(\_:didFinishPickingMediaWithInfo:)`函数会被调用，info参数中会包含被选择的视频URL。
 
-1.  The mediatype from the info dictionary is checked if it is a movie
-    type. If this is the case the URL of the video is extracted.
-2.  The writeVideoAtPathToSavedPhotosAlbum method saves the video into
-    the photo album
-3.  The ViewController is dismissed
-
-
 1. 首先会检测info dictionary中的mediatype是否是movie类型，如果是那么则会提取这个视频的URL；
 2. 调用writeVideoAtPathToSavedPhotosAlbum函数将视频存储到图片相册中；
 3. 隐藏该ViewController。
 
-Implement the **imagePickerControllerDidCancel** method
-
 `imagePickerControllerDidCancel`实现如下 : 
 
-```swift
+```
 func imagePickerControllerDidCancel(picker: UIImagePickerController) {
         picker.dismissViewControllerAnimated(true, completion: nil)
 }
 ```
 
-When the user press the Cancel button, the View Controller is dismissed.
-Build and Run the project on a real device, since the Simulator doesn't
-have a camera. Choose "Take Video" to shoot the video and click Use
-Video. Next, choose "View Library" and the video appears in the library.
-
 当用户按下取消按钮，该界面的View Controller就会被隐藏。因为模拟器没有摄像头，因此编译并且将该项目运行到真实的设备，点击"Take Video"按钮来拍一段视频，然后点击“Use Video”。再下一步选择“View Library”，此时该Video就会显示在Library中了。
 
 ![TakeVideo-Device.png](http://static1.squarespace.com/static/52428a0ae4b0c4a5c2a2cede/t/559d107ee4b0a65ec39328be/1436356736349/TakeVideo-Device.png)
 
-
-You can download the source code of
-the **IOS8SwiftTakeVideoPlayerTutorial** at the ioscreator repository
-on [Github](https://github.com/ioscreator/ioscreator).
-
 你可以在[这里](https://github.com/ioscreator/ioscreator)下载IOS8SwiftTakeVideoPlayerTutorial项目的完整代码。