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前言

  1. 运用dataWithContentsOfURL进行视频下载,并保存到相册
  2. 从沙盒获取信息:NSFileManager类首要对文件的操作(删去、修改、移动、仿制等等) NSFileHandle 类首要对文件内容进行读取和写入操作

I NSFileManager的运用

NSFileHandle对文件内容进行读取和写入例子:运用dataWithContentsOfURL进行视频下载,并保存到相册

NSFileManager类对文件的操作

1.1 视频下载,并保存到相册

  • 运用dataWithContentsOfURL进行视频下载,并保存到相册
NSFileManager *fileManage = [NSFileManager defaultManager];
        NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:videoUrl]];
        if (data == nil)
        {
            NSLog(@"网络出错,请稍后再试");
        }
        else
        {
            //用单例类 NSFileManager的方针,将文件写入本地
            BOOL isSuccess = [fileManage createFileAtPath:path contents:data attributes:nil];
            if (isSuccess)
            {
                NSLog(@"视频下载成功");
                // 保存视频到相册
                ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
                [library writeVideoAtPathToSavedPhotosAlbum:[NSURL fileURLWithPath:path]
                                            completionBlock:^(NSURL *assetURL, NSError *error) {
                                                if (error) {
                                                    NSLog(@"Save video fail:%@",error);
                                                } else {
                                                    //2018-09-13 20:03:33.870 WeChat[6484:1077151] [MMVideoCompressHelper getCacheFilePathFrom:file:///var/mobile/Media/DCIM/100APPLE/IMG_0041.mp4 ]
                                                    NSLog(@"Save video succeed.:%@",assetURL);//assets-library://asset/asset.mp4?id=45C3D675-C625-4C52-B133-66D0A709AC57&ext=mp4
                                                    // 获取相册的最新一条视频的path,进行SightDraft的创立
                                                }
                                            }];
            }
            else
            {
                NSLog(@"视频下载失利");
            }

1.2 NSFileManager类对文件的操作:删去、修改、移动、仿制

  • [在sb tweak 中 复制特定文件到特定app的沙盒途径]

<script src="https://gist.github.com/zhangkn/74ce4737a33221228244b9b18f8e545a.js"></script>

%new
- (void)setupkeyword{// /var/mobile/Media/keyword.txt -> sanboxpath/Documents/keyword.txt
	SBApplicationController *sbApplicationCtrl=[%c(SBApplicationController) sharedInstance];
	id app = [sbApplicationCtrl applicationWithBundleIdentifier:@"com.tencent.xin"];
	NSString *contentUserIDURL =  [app sandboxPath];
        //Library 
          //Documents
        //tmp keyword.txt
	NSString *realFile = [[contentUserIDURL stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"keyword.txt"];
        //复制文件到这个地方,即可
	//从某个途径读取文件内容 最好放在 /var/mobile/Media/keyword.txt -> realFile
	NSLog(@"knrealFile %@",realFile);
	NSString *tmpfile = @"/var/mobile/Media/keyword.txt";
	NSString *content = [NSString stringWithContentsOfFile:tmpfile encoding:NSUTF8StringEncoding error:nil];
	NSData *data = [content dataUsingEncoding: NSUTF8StringEncoding]; 
        //写到方针文件
              	 [data writeToFile:realFile atomically:YES];//掩盖
 }
  • 使用enumeratorAtPath,遍历NSDirectoryEnumerator 字典
  • 使用contentsOfDirectoryAtPath,遍历files数组
#import "KNdelateDirTool.h"
@implementation KNdelateDirTool
//使用enumeratorAtPath,便当NSDirectoryEnumerator 字典
static id setupdeletedir(NSString* path) {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError* err = nil;
    NSDirectoryEnumerator *dirEnum = [fileManager enumeratorAtPath:path];//获取NSDictionary
    NSString *file;
    while ((file = [dirEnum nextObject]))//遍历NSDictionary
        //        if ([file hasSuffix:@"/Documents"] || [file hasSuffix:@"/Library"] || [file hasSuffix:@"/tmp"] || [file hasSuffix:@"/StoreKit"]) 过滤条件
    {
        [fileManager removeItemAtPath:[path stringByAppendingPathComponent:file] error:&err];
        //            [fileManager createDirectoryAtPath:[path stringByAppendingPathComponent:file] withIntermediateDirectories:NO attributes:[NSDictionary dictionaryWithObjectsAndKeys:@"mobile", NSFileOwnerAccountName, @"mobile", NSFileGroupOwnerAccountName, nil] error:nil];
        if (err) {
            NSLog(@"setupdeletedir err:%@", err);
            return @[@(NO), err];// 失利和错误信息
        }
    }
    return @[@(YES)];// 成功
}
//使用contentsOfDirectoryAtPath,遍历files数组
static id kncleanDir(NSString* path, NSString* reg) {
    NSFileManager *fm = [NSFileManager defaultManager];
    NSArray *files = [fm contentsOfDirectoryAtPath:path error:NULL];
    for (NSString* file in files) {
        if (knmathFile(file, reg)) {// 正则表达式进行过滤,使用NSPredicate 实现,更多信息请看这儿:谓词NSPredicate技术的使用。https://blog.csdn.net/z929118967/article/details/74066170
            NSString* fullpath = [path stringByAppendingPathComponent:file];//途径的拼接
            NSError* err = nil;
            [fm removeItemAtPath:fullpath error:&err];//移除
            if (err) {
                NSLog(@"kncleanDir err:%@", err);
                return @[@(NO), err];
            }
        }
    }
    return @[@(YES)];
}
//谓词技术的运用 evaluateWithObject
static BOOL knmathFile(NSString* file, NSString* reg) {
    if (!reg)
        return YES;
    NSPredicate* predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",reg];
    return [predicate evaluateWithObject:file];
}
@end
  • 其他代码片段

github.com/kunnan/KNio…
gist.github.com/zhangkn/cd3…

code: KNiosreTool存储一些逆向剖析的东西代码片段: 清理文件、主动登录Wi-Fi

github.com/kunnan/KNio…
获取资源可重视公号:iOS逆向

II iOS保存图片到相册

blog.csdn.net/z929118967/…