关于UIImagePickerController的简单使用

    1.UIImagePickerController是iOS系统上获取图片的一个类，我们经常会用它来获取相机的图片或者，相册的图片；

    2.要想实现获取图片，要先添加两个代理：

<UIImagePickerControllerDelegate,UINavigationControllerDelegate>

        

         3部分关键代码及注释

- (IBAction)imagepicker:(id)sender {

    if ([UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) //判读数据源类型是否可以，如果设为相机类型，就可以知道摄像头是否能用。

{

        UIImagePickerController *picker=[[UIImagePickerControlleralloc]init];

        picker.allowsEditing=YES; 

        picker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;

        

        picker.delegate=self;

        

        [selfpresentViewController:pickeranimated:YEScompletion:nil]; //切换到picker view页面

       

    }

    

}

//当选择图片结束的操作；

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfoNS_DEPRECATED_IOS(2_0,3_0){

   

                 img.image=image;

[picker dismissViewControllerAnimated:YEScompletion:nil];}

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

//点击取消按钮

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;

展示