[移动开发]iOS开发：浏览本地文件+iCloud配置

工欲善其事必先利其器

话不多说，直接上图了。

1. 先去Apple官网配置证书
   
   这里你可以多创建几个开发的正式的，IDENTIFIER不一样就可以了。

2. 找到你项目的IDENTIFIER
   
   点进去选择你给这个证书创建的iCloud就可以了。

3. 配置Xcode，每个项目的正式和测试都有对应的ICloud，选择对应的就可以了
   

UIDocumentPickerViewController浏览文件

@property (nonatomic, strong) UIDocumentPickerViewController *documentPicker;
@property (nonatomic, copy) NSArray *types;

-(NSArray *)types {
    return @[
        @"public.data",
        
    ];
}

- (UIDocumentPickerViewController *)documentPicker {
    if (_documentPicker == nil) {
        _documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:self.types inMode:UIDocumentPickerModeOpen];
        _documentPicker.delegate = self;
        _documentPicker.modalPresentationStyle = UIModalPresentationFullScreen;
    }
    return _documentPicker;
}

 [self presentViewController:self.documentPicker animated:YES completion:nil];

#pragma mark ???- UIDocumentPickerDelegate
- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentsAtURLs:(NSArray<NSURL *> *)urls {
        NSFileCoordinator *fileCoordinator = [[NSFileCoordinator alloc] init];
        NSError *error;
        [fileCoordinator coordinateReadingItemAtURL:urls.firstObject options:0 error:&error byAccessor:^(NSURL *newURL) {
             
            //读取文件
            NSString *fileName = [newURL lastPathComponent];
            NSError *error = nil;
            NSData *fileData = [NSData dataWithContentsOfURL:newURL options:NSDataReadingMappedIfSafe error:&error];
            if (fileData != nil) {
                
            }
            //写入沙盒Documents
             NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:fileName];
//            [data writeToFile:path atomically:YES];
            NSFileManager *fileManager = [NSFileManager defaultManager];
            BOOL isExists = [fileManager fileExistsAtPath:filePath];
            if (isExists) {
                [fileManager removeItemAtPath:filePath error:nil];
            }
            BOOL isCreate = [fileManager createFileAtPath:filePath contents:nil attributes:nil];
            if (isCreate) {
                BOOL isWrite = [fileData writeToFile:filePath options:NSDataWritingAtomic error:nil];
                if (isWrite) {
				//写入成功   写你自己的业务逻辑
                }
            }
        }];
        [urls.firstObject stopAccessingSecurityScopedResource];
}

计算文件大小 返回字节数

- (unsigned long long)fileSizeOfPath:(NSString *)path
{
    // 总大小
    unsigned long long size = 0;
    NSFileManager *manager = [NSFileManager defaultManager];
    BOOL isDir = NO;
    BOOL exist = [manager fileExistsAtPath:path isDirectory:&isDir];
    // 判断路径是否存在
    if (!exist) return size;
    if (isDir) { // 是文件夹
        NSDirectoryEnumerator *enumerator = [manager enumeratorAtPath:path];
        for (NSString *subPath in enumerator) {
            NSString *fullPath = [path stringByAppendingPathComponent:subPath];
            size += [manager attributesOfItemAtPath:fullPath error:nil].fileSize;
            }
        }else{ // 是文件
            size += [manager attributesOfItemAtPath:path error:nil].fileSize;
        }
        return size;
}