iOS -UIImagePickerController单独设置

• UIImagePickerController想必是个很常用的控件，在使用中发现，pickerController默认创建出来同时可以拍摄照片或者是拍摄视频，如下：

UIImagePickerController *systemImagePicker = [[UIImagePickerController alloc]init];
    systemImagePicker.delegate = self;
    systemImagePicker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
    systemImagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    [self presentViewController:systemImagePicker animated:YES completion:nil];

• 如只需要拍照模式，不用设置mediaTypes即可。

UIImagePickerController *systemImagePicker = [[UIImagePickerController alloc]init];
    systemImagePicker.delegate = self;
    //systemImagePicker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
    systemImagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    systemImagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;//设置摄像头捕获类型
    [self presentViewController:systemImagePicker animated:YES completion:nil];

转载一篇文章，关于UIImagePickerController讲的很全，作为记录：
UIImagePickerController