IOS成长之路-调用照相机和相册功能

打开相机：

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//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：

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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];  

for ipad:

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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  后触发的方法

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

点击cancel 调用的方法

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

例子下载地址：http://download.csdn.net/download/like7xiaoben/4958356

转自：http://blog.csdn.net/like7xiaoben/article/details/8465237