ios UIImagePickerController简单说明

首先，VC中添加#import <MobileCoreServices/MobileCoreServices.h> 使用(NSString *) kUTTypeImage定义在其中

判断是否授权：

 NSString *mediaType = AVMediaTypeVideo;// Or AVMediaTypeAudio
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];

    AVAuthorizationStatusNotDetermined = 0,//未明确
    AVAuthorizationStatusRestricted,//受限
    AVAuthorizationStatusDenied,//不允许
    AVAuthorizationStatusAuthorized//允许

第一种使方法照相机:

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
//添加代理
imagePicker.delegate = self;
//是否允许编辑
imagePicker.allowsEditing = YES;
//资源类型
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
//media类型
imagePicker.mediaTypes =  [[NSArray alloc] initWithObjects: (NSString *) kUTTypeImage, nil];
//转跳
[self presentModalViewController:imagePicker animated:YES];

第二种使用摄像机：

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
 imagePicker.delegate = self;
 imagePicker.allowsEditing = YES;
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
//media类型
imagePicker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
//视频品质
imagePicker.videoQuality = UIImagePickerControllerQualityTypeLow;
[self presentModalViewController:imagePicker animated:YES];

第三种使用相册取图片类型：

 UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
 imagePicker.allowsEditing = YES;
 imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
 imagePicker.mediaTypes =  [[NSArray alloc] initWithObjects: (NSString *)kUTTypeImage, nil];
 [self presentModalViewController:imagePicker animated:YES];

第四种使用相册取视频类型：

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.allowsEditing = YES;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
 imagePicker.mediaTypes =  [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
[self presentModalViewController:imagePicker animated:YES];

代理：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
　　if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(NSString*)kUTTypeImage]) {
　　　　　　//获取照片的原图
        UIImage* original = [info objectForKey:UIImagePickerControllerOriginalImage];
        //获取图片裁剪的图
        UIImage* edit = [info objectForKey:UIImagePickerControllerEditedImage];
        //获取图片裁剪后，剩下的图
        UIImage* crop = [info objectForKey:UIImagePickerControllerCropRect];
        //获取图片的url
        NSURL* url = [info objectForKey:UIImagePickerControllerMediaURL];
        //获取图片的metadata数据信息
        NSDictionary* metadata = [info objectForKey:UIImagePickerControllerMediaMetadata];
        //如果是拍照的照片，则需要手动保存到本地，系统不会自动保存拍照成功后的照片
       // UIImageWriteToSavedPhotosAlbum(edit, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);

　　} else if ([[info objectForKey:UIImagePickerControllerMediaType] isEqualToString:(NSString*)kUTTypeMovie]) {
　　　　NSString *videoPath = [[info objectForKey:UIImagePickerControllerMediaURL] path];
　　　　self.fileData = [NSData dataWithContentsOfFile:videoPath]; 
　　}
　　[picker dismissModalViewControllerAnimated:YES];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker 
{
     [picker dismissModalViewControllerAnimated:YES];
}