UIImagePickerController使用方法

- (IBAction)selectIcon {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc]init];
　　//设置图库源
[imagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
　　//是否允许编辑图片
[imagePicker setAllowsEditing:YES];
　　//设置当前控制器为代理
[imagePicker setDelegate:self];
[self presentViewController:imagePicker animated:YES completion:nil];
}

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
[_icon setImage:info[UIImagePickerControllerEditedImage] forState:UIControlStateNormal];
[self dismissViewControllerAnimated:YES completion:nil];
}