UIImagePickerController属性与使用

1.   sourceType  照片选择控制器的源类型，默认是
UIImagePickerControllerSourceTypePhotoLibrary。
 UIImagePickerController*imagePicker = [[UIImagePickerController alloc]init];
 
 [imagePickersetSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
 
2.   allowsEditing 是否允许编辑，默认为NO
[imagePickersetAllowsEditing:YES];
 
3.   delegate 代理属性
-  (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info;
选择图片后执行的方法     
-  (void)imagePickerControllerDidCancel:(UIImagePickerController*)picker;
 
注意，需要设置代理
@interface WJImagePickerController()<UINavigationControllerDelegate,UIImagePickerControllerDelegate]]>

4.   效果截图