iOS导入其他APP下载的文件（用其他应用打开）

今天给自己的APP新增了一个小功能 可以打开iOS其他APPTXT 文件，一个很小的功能，做阅读APP的小伙伴不要错过。
附上APP地址： 一阅阅读
有想看小说的小伙伴可以试下 支持换源 支持自定义书源
效果如下

1.编辑info.plst

<key>CFBundleDocumentTypes</key>
<array>
    <dict>
        <key>CFBundleTypeIconFiles</key>
        <array>
            <string>icon.png</string>
            <string>icon@2x.png</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>com.myapp.common-data</string>
        <key>LSItemContentTypes</key>
        <array>
        //我只导入txt 所以只加了text
            <string>public.text</string>
//以下区域是我查到的但是我没有加
            <string>public.data</string>
        <string>com.microsoft.powerpoint.ppt</string>
            <string>public.item</string>
            <string>com.microsoft.word.doc</string>
            <string>com.adobe.pdf</string>
            <string>com.microsoft.excel.xls</string>
            <string>public.image</string>
            <string>public.content</string>
            <string>public.composite-content</string>
            <string>public.archive</string>
            <string>public.audio</string>
            <string>public.movie</string>
        </array>
    </dict>
</array>

2.在APPdelegate接收文件地址

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
    if (self.window) {
        if (url) {
            NSString *fileName = url.lastPathComponent; // 从路径中获得完整的文件名（带后缀）
            // path 类似这种格式：file:///private/var/mobile/Containers/Data/Application/83643509-E90E-40A6-92EA-47A44B40CBBF/Documents/Inbox/jfkdfj123a.pdf
            NSString *path = url.absoluteString; // 完整的url字符串
            path = [self URLDecodedString:path]; // 解决url编码问题

            NSMutableString *string = [[NSMutableString alloc] initWithString:path];

            if ([path hasPrefix:@"file://"]) { // 通过前缀来判断是文件
                // 去除前缀：/private/var/mobile/Containers/Data/Application/83643509-E90E-40A6-92EA-47A44B40CBBF/Documents/Inbox/jfkdfj123a.pdf
                [string replaceOccurrencesOfString:@"file://" withString:@"" options:NSCaseInsensitiveSearch range:NSMakeRange(0, path.length)];

                // 此时获取到文件存储在本地的路径，就可以在自己需要使用的页面使用了
                NSDictionary *dict = @{@"fileName":fileName,
                                       @"filePath":string};
            [[NSNotificationCenter defaultCenter] postNotificationName:TJBookStackWillImportTXTNotification object:nil userInfo:dict];

                return YES;
            }
        }
    }
    return YES;
}

// 当文件名为中文时，解决url编码问题
- (NSString *)URLDecodedString:(NSString *)str {
    NSString *decodedString=(__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(NULL, (__bridge CFStringRef)str, CFSTR(""), CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
    
    return decodedString;
}

3.在主页面对接收到的数据进行处理

不建议在APPdelegate进行处理 会拖慢进入APP速度

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(addLoacalBookWithFilePath:) name:TJBookStackWillImportTXTNotification object:nil];


-(void)addLoacalBookWithFilePath:(NSNotification *)notification{
    
    [SVProgressHUD showInfoWithStatus:@"正在后台解析书籍"];
//启动线程进行处理
    dispatch_queue_t conCurrentQueue = dispatch_queue_create("importBook", DISPATCH_QUEUE_CONCURRENT);
        dispatch_async(conCurrentQueue, ^{
            NSDictionary *dic = notification.userInfo;
            NSString *filePath = dic[@"filePath"];
            
            NSString *bookId = [NSString stringWithFormat:@"%@", @([[NSDate date] timeIntervalSince1970] * 1000)];
            
            [TJReadParser parseLocalBookWithFilePath:filePath bookId :bookId success:^(NSArray<TJChapterModel *> * _Nonnull chapters) {
                    // 创建书籍模型
                    TJBookModel *bookModel = [[TJBookModel alloc] init];
                    bookModel.bookType = TJBookTypeLocal;
                    bookModel.bookName = filePath.lastPathComponent;
                    // 本地书随机生成ID
                    bookModel.bookId = bookId;
                    bookModel.chapterCount = chapters.count;
                    for (TJChapterModel *chapter in chapters) {
                        chapter.bookId = bookModel.bookId;
                    }
                    [TJReadHelper addToBookStackWithBook:bookModel complete:^{
                        [TJChapterDataManager insertChaptersWithModels:chapters];
                        [SVProgressHUD showSuccessWithStatus:@"书籍已经成功加入书架"];
                        [[NSNotificationCenter defaultCenter] postNotificationName:TJBookStackDidChangeNotification object:nil userInfo:nil];
                        
                    }];
                } failure:^(NSError *error) {
                    [SVProgressHUD showErrorWithStatus:error.userInfo[NSUnderlyingErrorKey]];
                }];
            
            
        });
       
   
   
}

4.更新页面UI

记得回归线程

 dispatch_async(dispatch_get_main_queue(), ^{
        self.dataSource = [[TJReadRecordManager allBooksInStack] copy];
        [self.booksTableView reloadData];
    });