swift2.0 UIImagePickerController 拍照 相册 录像

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！

Demo下载地址