UIImagePickerController使用

最近在做照相，研究下UIImagePickerController的使用方法。引用UIImagePickerController  需用到两个代理<UIImagePickerControllerDelegate,UINavigationControllerDelegate>用UIImagePickerController选择、显示图片或视频，主要注意UIImagePickerController几个属性的设置

一：UI 显示样式，显示的格式确定
1：sourceType

@property(nonatomic) UIImagePickerControllerSourceType sourceType

enum {

UIImagePickerControllerSourceTypePhotoLibrary,
UIImagePickerControllerSourceTypeCamera,
UIImagePickerControllerSourceTypeSavedPhotosAlbum

};

typedef NSUInteger UIImagePickerControllerSourceType;

sourceType用来确定用户界面显示的样式：

共三种格式

UIImagePickerControllerSourceTypePhotoLibrary,

UIImagePickerControllerSourceTypeCamera,
UIImagePickerControllerSourceTypeSavedPhotosAlbum

为了区分是否支持所需引用的sourceType，一般要用到下面这个函数，以便确定sourceType。

+ (BOOL)isSourceTypeAvailable:(UIImagePickerControllerSourceType)sourceType

2:   mediaTypes

@property(nonatomic,copy) NSArray *mediaTypes

mediaTypes用来确定再picker里显示那些类型的多媒体文件，图片？视频？

+ (NSArray *)availableMediaTypesForSourceType:(UIImagePickerControllerSourceType)sourceType

UIImagePikerController的一些属性和方法：

 

@property(nonatomic)           UIImagePickerControllerSourceType     sourceType;                  

@property(nonatomic,copy)      NSArray                              *mediaTypes;                   //是否允许对获得的图片进行编辑,default value is NO.

@property(nonatomic)           BOOL                                  allowsEditing              //是否在确定页面出现裁剪框，进行裁剪

@property(nonatomic)           BOOL                                  allowsImageEditing    //目前已经被allowsEditing所替代

@property(nonatomic)           NSTimeInterval                        videoMaximumDuration   //视频最大的时间长度

//拍摄照片的清晰度，只有在照相机模式下可用

enum {

    UIImagePickerControllerQualityTypeHigh = 0,       // 高质量

    UIImagePickerControllerQualityType640x480 = 3,    // VGA quality

    UIImagePickerControllerQualityTypeMedium = 1,     // 中质量，适合于wifi传输

    UIImagePickerControllerQualityTypeLow = 2         // 低质量，适合于蜂窝数据传输

};

typedef NSUInteger UIImagePickerControllerQualityType;

 

@property(nonatomic)           UIImagePickerControllerQualityType    videoQuality    //默认选中的是UIImagePickerControllerQualityTypeMedium

@property(nonatomic)           BOOL                                  showsCameraControls    //是否显示照相机其他控件，默认yes

@property(nonatomic,retain)    UIView                                *cameraOverlayView    //类似相框

@property(nonatomic)           CGAffineTransform                     cameraViewTransform   //设定图像缩放， 如：picker.cameraViewTransform = CGAffineTransformScale(picker.cameraViewTransform, 1.0, 1.0); 

//可以设置照相机的模式，照相还是录视频，默认照相模式。

enum {

    UIImagePickerControllerCameraCaptureModePhoto,

    UIImagePickerControllerCameraCaptureModeVideo

};

typedef NSUInteger   UIImagePickerControllerCameraCaptureMode;

@property(nonatomic) UIImagePickerControllerCameraCaptureMode    cameraCaptureMode   

@property(nonatomic) UIImagePickerControllerCameraDevice      cameraDevice   //设置哪个引用摄像头，前置还是后置摄像头，默认是后置

//设置闪光灯模式

enum {

    UIImagePickerControllerCameraFlashModeOff  = -1,

    UIImagePickerControllerCameraFlashModeAuto = 0,

    UIImagePickerControllerCameraFlashModeOn   = 1

};

typedef NSInteger UIImagePickerControllerCameraFlashMode;   

@property(nonatomic) UIImagePickerControllerCameraFlashMode   cameraFlashMode  

@property(nonatomic) BOOL   showsCameraControls    //设置是否隐藏所有的标准的UI界面，默认是YES，(代表是用标准的UI界面)

@property(nonatomic,retain) UIView     *cameraOverlayView   //添加自定义信息层

iOS拍照控件同时显示拍照与录像

- (void) recordVideo: (id) sender
{

UIImagePickerController *ipc = [[UIImagePickerController alloc] init];

ipc.sourceType =  UIImagePickerControllerSourceTypeCamera;

ipc.delegate = self;

ipc.allowsEditing = YES;

ipc.videoQuality = UIImagePickerControllerQualityTypeMedium;

ipc.videoMaximumDuration = 30.0f; // 30 seconds

///ipc.mediaTypes = [NSArray arrayWithObject:@"public.movie"];

//主要是下边的两能数，@"public.movie", @"public.image"  一个是录像，一个是拍照

ipc.mediaTypes = [NSArray arrayWithObjects:@"public.movie", @"public.image", nil];

[self presentModalViewController:ipc animated:YES];

}