在应用开发中，有时候需要预览文档和视频，使用 UIDocumentInteractionController 来预览文件非常方便，支持的格式比较多，比如 docx、xlsx、pdf、mov、mp4、jpg、png 等等都可以。具体代码如下：
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@interface ViewController () <UIDocumentInteractionControllerDelegate> @property(nonatomic,strong) UIDocumentInteractionController * documentVC; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. NSString *path = [[NSBundle mainBundle] pathForResource:@"第 7 章 Mach-O 文件格式解析" ofType:@"docx"]; NSURL *url = [NSURL fileURLWithPath:path]; self.documentVC = [UIDocumentInteractionController interactionControllerWithURL:url]; self.documentVC.delegate = self; dispatch_async(dispatch_get_main_queue(), ^{ BOOL b = [self.documentVC presentPreviewAnimated:YES]; }); } #pragma mark 代理方法 //为快速预览指定控制器 - (UIViewController*)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController*)controller { NSLog(@"%@",NSStringFromSelector(_cmd)); return self; } //为快速预览指定View - (UIView*)documentInteractionControllerViewForPreview:(UIDocumentInteractionController*)controller { NSLog(@"%@",NSStringFromSelector(_cmd)); return self.view; } //为快速预览指定显示范围 - (CGRect)documentInteractionControllerRectForPreview:(UIDocumentInteractionController*)controller { NSLog(@"%@",NSStringFromSelector(_cmd)); // return self.view.frame; return CGRectMake(0, 0, self.view.frame.size.width, 300); } @end |
效果如下图，点击 Done 就能回到主界面。
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