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！