文档相关

#import "ViewController.h"
#import <MobileCoreServices/MobileCoreServices.h>
#import <AVFoundation/AVFoundation.h>
#import <MediaPlayer/MediaPlayer.h>

@interface ViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
{
BOOL canmerIsOK;
BOOL photoLibaryIsOk;
BOOL photosAlbumIsOk;
UIImagePickerController *_imagePickerController;
}

@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController
- (IBAction)showImagePickerView:(id)sender {
//NSLog(@"相册");
_imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

[self presentViewController:_imagePickerController animated:YES completion:nil];

}
- (IBAction)useCamera:(id)sender {
_imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
//录制视频时长，默认10s
_imagePickerController.videoMaximumDuration = 15;

//相机类型（拍照、录像...）字符串需要做相应的类型转换
_imagePickerController.mediaTypes = @[(NSString *)kUTTypeMovie,(NSString *)kUTTypeImage];

//视频上传质量
//UIImagePickerControllerQualityTypeHigh高清
//UIImagePickerControllerQualityTypeMedium中等质量
//UIImagePickerControllerQualityTypeLow低质量
//UIImagePickerControllerQualityType640x480
_imagePickerController.videoQuality = UIImagePickerControllerQualityTypeHigh;

//设置摄像头模式（拍照，录制视频）为录像模式
_imagePickerController.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
[self presentViewController:_imagePickerController animated:YES completion:nil];

}

- (void)viewDidLoad {
[super viewDidLoad];

_imagePickerController = [[UIImagePickerController alloc] init];
_imagePickerController.delegate = self;
_imagePickerController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
_imagePickerController.allowsEditing = YES;

// Do any additional setup after loading the view, typically from a nib.
}

#pragma mark UIImagePickerControllerDelegate
//该代理方法仅适用于只选取图片时
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo {
NSLog(@"选择完毕----image:%@-----info:%@",image,editingInfo);
}

//适用获取所有媒体资源，只需判断资源类型
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
NSString *mediaType=[info objectForKey:UIImagePickerControllerMediaType];
//判断资源类型
if ([mediaType isEqualToString:(NSString *)kUTTypeImage]){
//如果是图片
self.imageView.image = info[UIImagePickerControllerEditedImage];
//压缩图片
NSData *fileData = UIImageJPEGRepresentation(self.imageView.image, 1.0);
//保存图片至相册
UIImageWriteToSavedPhotosAlbum(self.imageView.image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
//上传图片
//        [self uploadImageWithData:fileData];

}else{
//如果是视频
NSURL *url = info[UIImagePickerControllerMediaURL];
//播放视频
//        _moviePlayer.contentURL = url;
//        [_moviePlayer play];
//保存视频至相册（异步线程）
NSString *urlStr = [url path];

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(urlStr)) {

UISaveVideoAtPathToSavedPhotosAlbum(urlStr, self, @selector(video:didFinishSavingWithError:contextInfo:), nil);
}
});
NSData *videoData = [NSData dataWithContentsOfURL:url];
//视频上传
//        [self uploadVideoWithData:videoData];
}
[self dismissViewControllerAnimated:YES completion:nil];
}

#pragma mark 图片保存完毕的回调
- (void) image: (UIImage *) image didFinishSavingWithError:(NSError *) error contextInfo: (void *)contextInf{

}

#pragma mark 视频保存完毕的回调
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInf{
if (error) {
NSLog(@"保存视频过程中发生错误，错误信息:%@",error.localizedDescription);
}else{
NSLog(@"视频保存成功.");
}
}

1NSString *fileToOpen = [[NSBundle mainBundle] pathForResource:@"readme" ofType:@"pdf"];
NSURL *url = [NSURL fileURLWithPath:fileToOpen];
docController = [[UIDocumentInteractionController interactionControllerWithURL:url] retain];
BOOL isValid = [docController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];

方法一：
用UIWebView就可以了
-(void)loadDocument:(NSString*)documentName inView:(UIWebView*)webView
{
NSString *path = [[NSBundle mainBundle] pathForResource:documentName ofType:nil];
NSURL *url = [NSURL fileURLWithPath:path];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
}

// Calling -loadDocument:inView:
[self loadDocument:@"test.doc" inView:self.myWebview];

方法我也已经测试过了，希望对大家有帮助，

方法二：
下面方法是直接通过QLPreviewController打开文档

qlViewController = [[QLPreviewController alloc] init];
qlViewController.dataSource = self;
[self presentModalViewController:qlViewController animated:YES];

- (NSInteger)numberOfPreviewItemsInPreviewController:(QLPreviewController *)controller {
return 1;
}
- (id <QLPreviewItem>)previewController:(QLPreviewController *)controller
previewItemAtIndex:(NSInteger)index{
//-------------读文件
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
if (!documentsDirectory) {
NSLog(@"Documents directory not found!");//return ;
}
NSString *fileName=[NSString stringWithFormat:@"%@.%@",nameQ,extQ];
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName];
//-------------
NSURL *myQLDocument = [NSURL fileURLWithPath:appFile];
return myQLDocument;
}