文件预览

UIDocumentInteractionController

初始化对象

网上有资料说要用这个属性要用retain,我也不知道为啥........

实现的代理方法

源码:

1.引入协议

2.初始化,签代理

_doc = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:filePath]];

 _doc.delegate = self;//设置代理

 [self.doc presentPreviewAnimated:YES]; 

presentPreviewAnimated:YES,弹出预览窗口

presentOptionsMenuFromRect:inView:animated;不弹出预览窗口,直接弹出菜单(还有很多方法)

3.实现代理方法

#pragma mark -------------documentDelegate---------

- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller {

    return self;

}

- (UIView *)documentInteractionControllerViewForPreview:(UIDocumentInteractionController *)controller {

    return self.view;

}

- (CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController *)controller {

    return  self.view.frame;

}