iOS开发 调用系统相机和相册

调用系统相机和相册 （iPad，iPhone）

打开相机：（iPad，iPhone）

//先设定sourceType为相机，然后判断相机是否可用（ipod）没相机，不可用将sourceType设定为相片库

UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;

// if (![UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {

// sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

// }

//sourceType = UIImagePickerControllerSourceTypeCamera; //照相机

//sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //图片库

//sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; //保存的相片

UIImagePickerController *picker = [[UIImagePickerController alloc] init];//初始化

picker.delegate = self;

picker.allowsEditing = YES;//设置可编辑

picker.sourceType = sourceType;

[self presentModalViewController:picker animated:YES];//进入照相界面

[picker release];

打开相册：（区分pad和iphone）for iphone：

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

if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {

pickerImage.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

//pickerImage.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

pickerImage.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:pickerImage.sourceType];

}

pickerImage.delegate = self;

pickerImage.allowsEditing = NO;

[self presentModalViewController:pickerImage animated:YES];

[pickerImage release];

打开相册for ipad:

UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

//sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; //保存的相片

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

picker.delegate = self;

picker.allowsEditing = NO;//是否允许编辑

picker.sourceType = sourceType;

/*

如果从一个导航按钮处呈现，使用：

presentPopoverFromBarButtonItem:permittedArrowDirections:animated:；

如果要从一个视图出呈现，使用：

presentPopoverFromRect:inView:permittedArrowDirections:animated:

如果设备旋转以后，位置定位错误需要在父视图控制器的下面方法里面重新定位：

didRotateFromInterfaceOrientation:（在这个方法体里面重新设置rect）

然后再次调用：

- (void)presentPopoverFromRect:(CGRect)rect inView:(UIView *)view permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections animated:(BOOL)animated

*/

//UIPopoverController只能在ipad设备上面使用；作用是用于显示临时内容，特点是总是显示在当前视图最前端，当单击界面的其他地方时自动消失。

UIPopoverController *popover = [[UIPopoverController alloc]initWithContentViewController:picker];

self.imagePicker = popover;

//permittedArrowDirections 设置箭头方向

[self.imagePicker presentPopoverFromRect:CGRectMake(0, 0, 300, 300) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

[picker release];

[popover release];

点击相册中的图片 货照相机照完后点击use

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

点击cancel 调用的方法

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

注意：需要添加@property (nonatomic, retain) UIPopoverController *imagePicker;