iOS打开本地和网络上的word、ppt、excel等文件

#iOS打开本地和网络上的word、ppt、excel、text等文件#

 iOS开发过程中可能需要预览一些文件，这些文件的格式可能有word、ppt、excel等文件格式。那么系统提供两个类去预览这些文件，这两个类分别为QLPreviewController和UIDocumentInteractionController。

一、先看QLPreviewController怎么用。

我们要用QLPreviewController，首先要 import < QuickLook/QuickLook.h >,然后创建一个QuickLookViewController继承UIViewController，并且要遵守QuickLookViewController的代理方法 < QLPreviewControllerDataSource,

QLPreviewControllerDelegate >，这个和tableView的用法很相似。下面看代码：

.h文件中的代码

# import < UIKit/UIKit.h >

# import < QuickLook/QuickLook.h >

@interface QuickLookViewController : UIViewController < QLPreviewControllerDataSource,

QLPreviewControllerDelegate >

@property (nonatomic,strong) QLPreviewController *previewController;

@property (nonatomic,retain)NSURL *fileURL;

@end

.m文件中的代码：

# import “QuickLookViewController.h”

@interface QuickLookViewController ()

@end

@implementation QuickLookViewController

@synthesize previewController = _previewController;

(void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor whiteColor];

self.title = @”附件预览”;

_previewController = [[QLPreviewController alloc] init];

_previewController.dataSource = self;

_previewController.delegate = self;

_previewController.view.frame = CGRectMake(0, 64, self.view.frame.size.width , self.view.frame.size.height);

_previewController.currentPreviewItemIndex = 0;

// [self addChildViewController:_previewController];

[self.view addSubview:_previewController.view];

[_previewController reloadData];

}

- (id ) previewController: (QLPreviewController *) controller previewItemAtIndex: (NSInteger) index{

return self.fileURL;

}

- (NSInteger)numberOfPreviewItemsInPreviewController:(QLPreviewController *)controller{

return 1;

}

@end

这样我们就完成了这个QuickLookViewController，再来看用的时候怎么写：

NSString *filePath = [[NSBundle mainBundle] pathForResource:@”Reader” ofType:@”pdf”];

NSURL *URL = [NSURL fileURLWithPath:filePath];

QuickLookViewController *quickLookVC = [[QuickLookViewController alloc]init];

quickLookVC.fileURL = URL;//本地图片的url

[self.navigationController pushViewController:quickLookVC animated:YES];

二、再看UIDocumentInteractionController怎么用。

我们还是要建立一个DocumentInteractionViewController，继承UIViewController，并且遵守代理UIDocumentInteractionControllerDelegate。下面看代码：

.h里面的代码

# import < UIKit/UIKit.h >

@interface DocumentInteractionViewController : UIViewController< UIDocumentInteractionControllerDelegate,UIAlertViewDelegate >

@property(nonatomic,strong) UIDocumentInteractionController *documentInteractionController;

- (void)openFileWithURL:(NSURL *)URL;

@end

.m里面的代码

# import “DocumentInteractionViewController.h”

@interface DocumentInteractionViewController ()

{

NSURL *_fileURL;

BOOL _isPreview;

BOOL _isOpenInMenu;

}

@end

@implementation DocumentInteractionViewController

(void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor whiteColor];

self.navigationController.navigationBarHidden = YES;

}

- (void)openFileWithURL:(NSURL *)URL

{

NSLog(@”now open %@”,URL);

if (URL) {

_fileURL = URL;

_isPreview = NO;

_isOpenInMenu = NO;

// Initialize Document Interaction Controller

self.documentInteractionController = [UIDocumentInteractionController

interactionControllerWithURL:URL];

// Configure Document Interaction Controller

self.documentInteractionController.delegate = self;

// Preview File

[self.documentInteractionController presentPreviewAnimated:YES];

[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(checkPreview) userInfo:nil repeats:NO];
}

}

(void)checkPreview

{

if(_isPreview == NO)

{

if (_fileURL) {

// Initialize Document Interaction Controller

self.documentInteractionController = [UIDocumentInteractionController

interactionControllerWithURL:_fileURL];

// Configure Document Interaction Controller

self.documentInteractionController.delegate = self;

// Present Open In Menu

[self.documentInteractionController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];

[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(checkOpenInMenu) userInfo:nil repeats:NO];
}

}

}

(void)checkOpenInMenu{

if(_isOpenInMenu == NO)

{

[self showWarning];

[[UIApplication sharedApplication]openURL:_fileURL];

}

}

(void)showWarning{

NSString *fileType = [[_fileURL.absoluteString componentsSeparatedByString:@”.”]lastObject];

UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@”出错提示” message:[NSString stringWithFormat:@”不支持%@格式，请下载相关播放器打开”,fileType] delegate:self cancelButtonTitle:@”确定” otherButtonTitles:nil];

[alert show];

}

(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

[self.navigationController popViewControllerAnimated:YES];

}

(UIViewController )documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController )controller{

return self;

}

// Preview presented/dismissed on document. Use to set up any HI underneath.

- (void)documentInteractionControllerWillBeginPreview:(UIDocumentInteractionController *)controller{

controller.name = @”附件预览”;

NSLog(@”willBeginPreview”);

_isPreview = YES;

}

(void)documentInteractionControllerDidEndPreview:(UIDocumentInteractionController *)controller{

NSLog(@”didEndPreview”);

[self.navigationController popViewControllerAnimated:YES];

}

// Options menu presented/dismissed on document. Use to set up any HI underneath.

- (void)documentInteractionControllerWillPresentOptionsMenu:(UIDocumentInteractionController *)controller{

NSLog(@”willPresentOptionsMenu”);

}

(void)documentInteractionControllerDidDismissOptionsMenu:(UIDocumentInteractionController *)controller{

NSLog(@”didDismissOptionsMenu”);

}

// Open in menu presented/dismissed on document. Use to set up any HI underneath.

- (void)documentInteractionControllerWillPresentOpenInMenu:(UIDocumentInteractionController *)controller{

NSLog(@”willPresentOpenInMenu”);

_isOpenInMenu = YES;

}

- (void)documentInteractionControllerDidDismissOpenInMenu:(UIDocumentInteractionController *)controller{

NSLog(@”didDismissOpenInMenu”);

[self.navigationController popViewControllerAnimated:YES];

}

@end

这样我们就完成了这个DocumentInteractionViewController，再来看用的时候怎么写：

NSString *filePath = [[NSBundle mainBundle] pathForResource:@”Reader” ofType:@”pdf”];

NSURL *URL = [NSURL fileURLWithPath:filePath];

DocumentInteractionViewController *documentVC = [[DocumentInteractionViewController alloc]init];

[documentVC openFileWithURL:URL]; //本地文件的URL

[self.navigationController pushViewController:documentVC animated:YES];

上面讲的都是打开的本地的文件，那么我如果要预览一个网页上的资源呢？类似这样的URL http://weixintest.ihk.cn/ihkwx_upload/1.pdf ，怎么办？

理论是这样的，第一次预览，我们要下载到本地，然后打开这个资源，那么第n（n>1）次打开就从本地找到下载的这个资源直接打开就可以了。

那么我们要在我们的vc里面写一个UIWebView了。比如我们的vc就是OpenRemoteFileViewController，那么来看具体的代码实现

.h文件里面的代码

# import < UIKit/UIKit.h>

#import < QuickLook/QuickLook.h>

@interface OpenRemoteFileViewController : UIViewController

@property (nonatomic, retain)NSString *fileURLString;

@end

.m文件里面的代码

#import “OpenRemoteFileViewController.h”

@interface OpenRemoteFileViewController () < UIWebViewDelegate,QLPreviewControllerDataSource,QLPreviewControllerDelegate >{

UIWebView *openFileWebView;

}

@property (nonatomic,strong)NSURL *fileURL;

@end

@implementation OpenRemoteFileViewController

-(void)openPDF:(UIButton *)sender{

openFileWebView = [[UIWebView alloc]initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height)];

openFileWebView.delegate = self;

[openFileWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.fileURLString]]];

}

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor whiteColor];
UIButton *centerBtn = [UIButton buttonWithType:UIButtonTypeCustom];
centerBtn.backgroundColor = [UIColor orangeColor];
centerBtn.frame = CGRectMake(0, 0, 200, 50);
centerBtn.center = self.view.center;
[centerBtn addTarget:self action:@selector(openPDF:) forControlEvents:UIControlEventTouchUpInside];
[centerBtn setTitle:@"打开一个远程PDF" forState:UIControlStateNormal];
[self.view addSubview:centerBtn];

}

- (BOOL)webView:(UIWebView )webView shouldStartLoadWithRequest:(NSURLRequest )request navigationType:(UIWebViewNavigationType)navigationType

{

return YES;

}

#pragma mark - Web代理

- (void)webViewDidFinishLoad:(UIWebView *)webView

{

NSURL *targetURL = [NSURL URLWithString:self.fileURLString];

NSString *docPath = [self documentsDirectoryPath];
NSString *pathToDownloadTo = [NSString stringWithFormat:@"%@/%@", docPath, [targetURL lastPathComponent]];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL hasDownLoad= [fileManager fileExistsAtPath:pathToDownloadTo];
if (hasDownLoad) {
self.fileURL = [NSURL fileURLWithPath:pathToDownloadTo];
QLPreviewController *qlVC = [[QLPreviewController alloc]init];
qlVC.delegate = self;
qlVC.dataSource = self;
[self.navigationController pushViewController:qlVC animated:YES];

//

}

else {

NSURL *targetURL = [NSURL URLWithString:self.fileURLString];

NSData *fileData = [[NSData alloc] initWithContentsOfURL:targetURL];
// Get the path to the App's Documents directory
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
[fileData writeToFile:[NSString stringWithFormat:@"%@/%@", documentsDirectory, [targetURL lastPathComponent]] atomically:YES];
NSURLRequest *request = [NSURLRequest requestWithURL:targetURL];
[openFileWebView loadRequest:request];
}

NSLog(@"webViewDidFinishLoad");

}

(void)webView:(UIWebView )webView didFailLoadWithError:(NSError )error

{

NSLog(@”didFailLoadWithError”);

}

(NSInteger)numberOfPreviewItemsInPreviewController:(QLPreviewController *)controller {

return 1;

}

(id )previewController:(QLPreviewController *)controller previewItemAtIndex:(NSInteger)index {

return self.fileURL;

}

(void)previewControllerWillDismiss:(QLPreviewController *)controller {

NSLog(@”previewControllerWillDismiss”);

}

(void)previewControllerDidDismiss:(QLPreviewController *)controller {

NSLog(@”previewControllerDidDismiss”);

}

(BOOL)previewController:(QLPreviewController )controller shouldOpenURL:(NSURL )url forPreviewItem:(id )item{

return YES;

}

(CGRect)previewController:(QLPreviewController )controller frameForPreviewItem:(id )item inSourceView:(UIView __nullable * __nonnull)view{

return CGRectZero;

}

(NSString *)documentsDirectoryPath {

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectoryPath = [paths objectAtIndex:0];

return documentsDirectoryPath;

}

@end

那么我们用的时候是这样的

OpenRemoteFileViewController *openRemoteFileVC =[[OpenRemoteFileViewController alloc]init];

openRemoteFileVC.fileURLString = @”http://weixintest.ihk.cn/ihkwx_upload/1.pdf“;//网络资源URL

[self.navigationController pushViewController:openRemoteFileVC animated:YES];

打开本地和网络上资源的方法都给出来了，选择适合你自己的就可以了。

文章最后提供demo地址：https://github.com/zhengwenming/OpenFile

原创博客，不得转载，谢谢。