删除某个文件夹下的所有文件

最新推荐文章于 2024-04-25 12:05:50 发布

转载最新推荐文章于 2024-04-25 12:05:50 发布 · 79 阅读

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原文链接：http://www.cnblogs.com/tian-sun/p/4849716.html

本文介绍如何在iOS应用中进行文件操作，包括删除指定文件夹下的.png文件和创建新文件夹来保存图片。提供了详细的Swift代码示例，展示了如何使用NSFileManager进行文件管理和路径操作。

//删除本地文件夹下保存的文件

                    NSFileManager *fileManager = [NSFileManager defaultManager];
                    NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];
                    NSString *dicrectoryPath = [docPath stringByAppendingPathComponent:@"Pic"];

                    NSArray *fileList = [[NSArray alloc] init];
                    //fileList便是包含有该文件夹下所有文件的文件名及文件夹名的数组
                    fileList = [fileManager contentsOfDirectoryAtPath:dicrectoryPath error:nil];
                    for (NSString *path in fileList) {
                        if ([path containsString:@"png"]) {
                            NSString *filePath = [dicrectoryPath stringByAppendingPathComponent:path];
                            BOOL result1 = [fileManager removeItemAtPath:filePath error:nil];
                            if (result1) {
                                NSLog(@"删除成功");
                            }
                        }

}

//创建文件将图片保存到该路径下

    NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];
    NSTimeInterval a=[dat timeIntervalSince1970]*1000;
    NSString *timeString = [NSString stringWithFormat:@"%.0f", a];

    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];
    NSString *dicrectoryPath = [docPath stringByAppendingPathComponent:@"Pic"];
    NSString *filePath;
    BOOL rel = [fileManager fileExistsAtPath:dicrectoryPath isDirectory:nil];
    if (rel) {
        NSLog(@"存在文件夹");

        filePath = [dicrectoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@%@.png", [[DataHandle shareDataHandle] getLocalData:USERID], timeString]];
    } else {
        NSLog(@"不存在文件夹");
        NSError *error = nil;
        BOOL result = [fileManager createDirectoryAtPath:dicrectoryPath withIntermediateDirectories:YES attributes:nil error:&error];
        if (result) {
            filePath = [dicrectoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@%@.png", [[DataHandle shareDataHandle] getLocalData:USERID], timeString]];
        }
    }

[data writeToFile:filePath atomically:YES];

转载于:https://www.cnblogs.com/tian-sun/p/4849716.html