UIDocumentInteractionController对文件的预览，或分享等操作

使用系统控件UIDocumentInteractionController对多种格式的文件进行预览，或分享等的操作。

代码示例如下：

// 获取文件路径

NSURL *url = [[NSBundle mainBundle] URLForResource:@"read" withExtension:@"txt"];

// 或
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"performanceOptimization" ofType:@"pdf"];
NSURL *url = [NSURL fileURLWithPath:filePath]; // 注意：使用[NSURL URLWithString:filePath]无效

// 实例化UIDocumentInteractionController

UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
documentController.delegate = self;

// 文件操作

// 1 预览

[documentController presentPreviewAnimated:YES]; // 预览文件

// 2 分享等

[documentController presentOptionsMenuFromRect:self.view.bounds inView:self.view animated:YES]; // 菜单操作

// 实现代理，添加协议 UIDocumentInteractionControllerDelegate

- (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller canPerformAction:(nullable SEL)action
{
    // 响应方法
    NSLog(@"12 %s", __func__);
    return YES;
}

- (BOOL)documentInteractionController:(UIDocumentInteractionController *)controller performAction:(nullable SEL)action
{
    //
    NSLog(@"13 %s", __func__);
    return YES;
}

- (void)documentInteractionControllerWillPresentOptionsMenu:(UIDocumentInteractionController *)controller
{
    // 页面显示后响应
    NSLog(@"9 %s", __func__);
}

- (void)documentInteractionControllerDidDismissOptionsMenu:(UIDocumentInteractionController *)controller
{
    // 取消时响应
    NSLog(@"10 %s", __func__);
}

- (UIViewController *)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller
{
    NSLog(@"1 %s", __func__);
    return self;
}

- (UIView *)documentInteractionControllerViewForPreview:(UIDocumentInteractionController *)controller
{
    NSLog(@"2 %s", __func__);
    return self.view;
}

- (CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController *)controller
{
    NSLog(@"3 %s", __func__);
    return self.view.frame;
}

// 文件分享面板退出时调用
- (void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller
{
    NSLog(@"4 %s", __func__);
    NSLog(@"dismiss");
}

// 文件分享面板弹出的时候调用
- (void)documentInteractionControllerWillPresentOpenInMenu:(UIDocumentInteractionController *)controller
{
    NSLog(@"5 %s", __func__);
    NSLog(@"WillPresentOpenInMenu");
}

// 当选择一个文件分享App的时候调用
- (void)documentInteractionController:(UIDocumentInteractionController *)controller willBeginSendingToApplication:(nullable NSString *)application
{
    NSLog(@"6 %s", __func__);
    NSLog(@"begin send : %@", application);
}

// Preview presented/dismissed on document.  Use to set up any HI underneath.
- (void)documentInteractionControllerWillBeginPreview:(UIDocumentInteractionController *)controller
{
    NSLog(@"7 %s", __func__);
}
- (void)documentInteractionControllerDidEndPreview:(UIDocumentInteractionController *)controller
{
    // 完成时响应
    NSLog(@"8 %s", __func__);
}

- (void)documentInteractionController:(UIDocumentInteractionController *)controller didEndSendingToApplication:(nullable NSString *)application
{
    NSLog(@"11 %s", __func__);
}

操作示例图

UIDocumentInteractionController对文件的预览，或分享等操作

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