从相册简单选着图片

                  使用UIImagePickerController能很简单的从相册中进行照片选着。只要创建UIImagePickerController后，就可以实现照片选着与相册相关的功能。首先要导入两个代理方法。这两个方法是

<UIImagePickerControllerDelegate,UINavigationControllerDelegate>

则实现显示相册的代码是

UIImagePickerControllerSourceType sourceType=UIImagePickerControllerSourceTypePhotoLibrary;    if ([UIImagePickerController isSourceTypeAvailable:sourceType]) {        UIImagePickerController*Picker=[[UIImagePickerController alloc]init];        Picker.delegate=self;        Picker.sourceType=sourceType;        [self presentViewController:Picker animated:YES completion:nil];    }

其中sourceType的属性有三种，你可以选着。但是，选着后要判断你的设备是否有该属性相关的设备。

sourceType的属性UIImagePickerControllerSourceType功能说明                                                 UIImagePickerControllerSourceTypePhotoLibrary是从相册中打开照片选择画面UIImagePickerControllerSourceTypeCamera启动摄像头打开摄像画面UIImagePickerControllerSourceTypeSavedPhotosAlbum直接打开保存的照片列表。如果有摄像头设备，则打开相册。还有在界面跳转时，有的资料上是以

[self presentModalViewController:Picker animated:YES];

这个形式写的，但是,不是不可用，只是有警告。。。推荐使用上述代码里面的。。。

现在程序会调用置于delegate属性，实现

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

方法进行处理。注意：被选者的图片将以

UIImagePickerControllerOriginalImage

为建值从Info 中取得。。。代码如下：

首先创建一个接受图片的ImageView

@interface ViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>{    UIImageView*MyImageView;}@end

然后

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{                    UIImage*image=[info objectForKey:UIImagePickerControllerOriginalImage];    MyImageView.image=image;    ///[self dismissModalViewControllerAnimated:YES];不推荐使用，但也可以使用    [self dismissViewControllerAnimated:YES completion:nil];    }

注意：关闭相册也可以使用下面方法

-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{    [self dismissViewControllerAnimated:YES completion:nil];}