iOS中查看&打印 .pdf .doc .docx文件

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一、背景需求介绍

怎么让APP支持查看&打印word,pdf文档?

iOS是有支持这个功能的控件QLPreviewController.

配置:

只需导入库:

二、示例代码如下:

实现的功能是在一个webView中点击获取下载地址进行下载一个文件,之后用QLPreviewController打开,QLPreviewController支持打印功能.

在.h文件中

#import#import@interface ViewController : UIViewController//打开word文档需要引入的视图控制器@property(nonatomic,strong) QLPreviewController *previewController;@end

在.m文件中

#import "ViewController.h"#import "AFNetworking.h"@interface ViewController ()//保存本地的地址@property (nonatomic ,copy) NSString *path;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.        [self initWeb];    }- (void)initWeb{UIWebView *web =[[UIWebView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];NSString *url = @"网页地址";NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];web.delegate = self;[web loadRequest:request];[self.view addSubview:web];}#pragma UIWebViewDelegate- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{//判断是否是单击if (navigationType == UIWebViewNavigationTypeLinkClicked){//点击网页中的文件截取到的网址(文件下载地址)NSURL *url = [request URL];if([[UIApplication sharedApplication]canOpenURL:url]){NSLog(@"url==%@",url);//缓存到本地沙盒的地址NSString *savedPath = [NSHomeDirectory() stringByAppendingString:@"/Documents/附件详情"];[self downloadFileWithOption:nil withInferface:[url absoluteString] savedPath:savedPath downloadSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {} downloadFailure:^(AFHTTPRequestOperation *operation, NSError *error) {} progress:^(float progress) {}];}return NO;}return YES;}//下载文档,并保存(这里比较low还用的AFNetworking 2.x 来下载附件)- (void)downloadFileWithOption:(NSDictionary *)paramDic withInferface:(NSString*)requestURL savedPath:(NSString*)savedPath downloadSuccess:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success downloadFailure:(void (^)(AFHTTPRequestOperation *operation,NSError *error))failure progress:(void (^)(float progress))progress{AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];NSMutableURLRequest *request =[serializer requestWithMethod:@"GET" URLString:requestURL parameters:paramDic error:nil];AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];[operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:savedPath append:NO]];[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {float p = (float)totalBytesRead / totalBytesExpectedToRead;progress(p);//        NSLog(@"download：%f", (float)totalBytesRead / totalBytesExpectedToRead);}];[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {success(operation,responseObject);_path = nil;NSDictionary *dic = operation.response.allHeaderFields;NSLog(@"下载成功,%@",dic);NSString *fileName = dic[@"Content-Disposition"];if(fileName){//判断格式if ([fileName rangeOfString:@".docx"].location !=NSNotFound) {//            NSLog(@"docx文档");NSFileManager *manager = [NSFileManager new];_path = [savedPath stringByAppendingString:@".docx"];[manager moveItemAtPath:savedPath toPath:_path error:nil];}else if ([fileName rangeOfString:@".doc"].location !=NSNotFound){//            NSLog(@"doc文档");NSFileManager *manager = [NSFileManager new];_path = [savedPath stringByAppendingString:@".doc"];[manager moveItemAtPath:savedPath toPath:_path error:nil];}else if([fileName rangeOfString:@".png"].location !=NSNotFound){//            NSLog(@"图片");_path = [savedPath stringByAppendingString:@".png"];NSFileManager *manager = [NSFileManager new];_path = [savedPath stringByAppendingString:@".png"];[manager moveItemAtPath:savedPath toPath:_path error:nil];}else if([fileName rangeOfString:@".jpg"].location !=NSNotFound){//            NSLog(@"图片");_path = [savedPath stringByAppendingString:@".jpg"];NSFileManager *manager = [NSFileManager new];_path = [savedPath stringByAppendingString:@".jpg"];[manager moveItemAtPath:savedPath toPath:_path error:nil];}}if (_path) {self.previewController = [QLPreviewController new];self.previewController.dataSource = self;[self.previewController setDelegate:self];//跳转到打开word文档页面[self presentViewController:self.previewController animated:YES completion:nil];}} failure:^(AFHTTPRequestOperation *operation, NSError *error) {success(operation,error);NSLog(@"下载失败,error==%@",error);}];[operation start];}#pragma QLPreViewDelegate- (NSInteger) numberOfPreviewItemsInPreviewController: (QLPreviewController *) controller{    return 1;}- (id)previewController: (QLPreviewController *)controller previewItemAtIndex:(NSInteger)index{return [NSURL fileURLWithPath:_path];}- (void)previewControllerDidDismiss:(QLPreviewController *)controller{if(![_path  isEqual: @""]){NSFileManager * fileManager = [[NSFileManager alloc]init];[fileManager removeItemAtPath:_path error:nil];}}@end

之后的打开的页面如图:

点击print后,连接支持airPrint的打印机进行打印:

Demo下载链接：点击这里