系统 ios9.1

语言swift2.0

在app 里最常用的功能就是多媒体选择，首先我们storyboard 创建一个button 用于触发选择事件

@IBAction func selectImageAction(sender: AnyObject) {}

这时候通常会弹出来一个ActionSheet 上面有拍照 ， 相册，录像 和取消 这几项。iOS 8 以后actionsheet 和 alertview 都统一用UIAlertController 方法调用，8.3以前actionsheet 有独立的方法 后来都废弃了。首先我们要加入actionsheet 相关delegate 如下

class ViewController: UIViewController ,UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIActionSheetDelegate { }

@IBAction func selectImageAction(sender: AnyObject) {      let actionSheetController: UIAlertController = UIAlertController(title: "请选择", message:nil, preferredStyle: .ActionSheet)        //取消按钮        let cancelAction: UIAlertAction = UIAlertAction(title: "取消", style: .Cancel) { action -> Void in //Just dismiss the action sheet } actionSheetController.addAction(cancelAction) //拍照 let takePictureAction: UIAlertAction = UIAlertAction(title: "拍照", style: .Default) { action -> Void in [self .initWithImagePickView("拍照")] } actionSheetController.addAction(takePictureAction) //相册选择 let choosePictureAction: UIAlertAction = UIAlertAction(title: "相册", style: .Default) { action -> Void in [self .initWithImagePickView("相册")] } actionSheetController.addAction(choosePictureAction) //摄像 let moviePictureAction: UIAlertAction = UIAlertAction(title: "摄像", style: .Default) { action -> Void in [self .initWithImagePickView("摄像")] } actionSheetController.addAction(moviePictureAction) self.presentViewController(actionSheetController, animated: true, completion: nil) }

这样我们想要的actionSheet 创建完成

仔细看上面的代码你会发现 [self .initWithImagePickView(“拍照”)]

这个函数，我通过这个函数选择imagePicker 不同的参数

首先创建一个 var imagePicker : UIImagePickerController! 对象

然后实现相关方法

func initWithImagePickView(type:NSString){        self.imagePicker = UIImagePickerController()        self.imagePicker.delegate      = self;        self.imagePicker.allowsEditing = true; switch type{ case "拍照": self.imagePicker.sourceType = .Camera break case "相册": self.imagePicker.sourceType = .PhotoLibrary break case "录像": self.imagePicker.sourceType = .Camera self.imagePicker.videoMaximumDuration = 60 * 3 self.imagePicker.videoQuality = .Type640x480 self.imagePicker.mediaTypes = [String(kUTTypeMovie)] break default: print("error") } presentViewController(self.imagePicker, animated: true, completion: nil) }

swift 可以支持字符串，你也可以尝试其他类型看看！一些方法跟object c 基本一样

下面实现imagepick 的 delegate 方法就可以了

如下

对了如果要引入录制视频功能话别忘记了加

MobileCoreServices.framework 库 和 import MobileCoreServices 头文件

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {

let mediaType = info[UIImagePickerControllerMediaType] as! String        let compareResult = CFStringCompare(mediaType as NSString!, kUTTypeMovie, CFStringCompareFlags.CompareCaseInsensitive)        //判读是否是视频还是图片 if compareResult == CFComparisonResult.CompareEqualTo { let moviePath = info[UIImagePickerControllerMediaURL] as? NSURL //获取路径 let moviePathString = moviePath!.relativePath if UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(moviePathString!) { UISaveVideoAtPathToSavedPhotosAlbum(moviePathString!, nil, nil, nil) } print("视频") } else { print("图片") let image = info[UIImagePickerControllerOriginalImage] as? UIImage self.imageView.image = image; } imagePicker.dismissViewControllerAnimated(true, completion: nil) }

这样一个多媒体选择功能基本实现了！