iOS 应用中加载文档pdf／word／txt

一、加载PDF文档：应用内打开文档、手机中其他应用打开文档 Demo

首先拖入一个文档pdf、word、txt，打开不同的文档知识 文件名字、类型修改即可

#import "ReadViewController.h"

@interface ReadViewController ()<UIDocumentInteractionControllerDelegate>
{
    UIDocumentInteractionController * readvc;
}
@end

@implementation ReadViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    [self creatButton];

}

-(void)creatButton{

    NSArray * arrtext = @[@"在其他App中打开",@"AppPreView"];

    for (int i =; i<; i++) {

        UIButton * but = [UIButton buttonWithType:UIButtonTypeSystem];
        but.frame = CGRectMake(, +i*, , );
        but.tag = i;
        [but setTitle:arrtext[i] forState:UIControlStateNormal];

        [but addTarget:self action:@selector(but:) forControlEvents:UIControlEventTouchUpInside];

        [self.view addSubview:but];

    }

}

-(void)but:(UIButton*)but{

    switch (but.tag) {
        case :
        {

            NSURL * urll = [[NSBundle mainBundle]URLForResource:@"CocoaChina" withExtension:@"pdf"];
            if (urll) {
                readvc = [UIDocumentInteractionController interactionControllerWithURL:urll];
                readvc.delegate = self;
                [readvc presentOpenInMenuFromRect:[but frame] inView:self.view animated:YES];

            }

        }
            break;
        case :{

            //yulan
            NSURL * urld =[[NSBundle mainBundle]URLForResource:@"CocoaChina"  withExtension:@"pdf"];

            if (urld) {

                readvc = [UIDocumentInteractionController interactionControllerWithURL:urld];
                readvc.delegate  = self;
                [readvc presentPreviewAnimated:YES];

            }

        }
        default:
            break;
    }

}

-(UIViewController*)documentInteractionControllerViewControllerForPreview:(UIDocumentInteractionController *)controller{

    return self;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end