如何删除ios应用程序的tmp目录文件？

Question

我正在开发一个使用iPhone摄像头的应用程序,经过多次测试后,我意识到它将所有捕获的视频存储在应用程序的tmp目录中.即使手机重新启动,捕获也不会消失.

有没有办法删除所有这些捕获或有没有办法轻松清理所有缓存和临时文件？

Answer 1

是.这种方法效果很好:

+ (void)clearTmpDirectory
{
    NSArray* tmpDirectory = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:NSTemporaryDirectory() error:NULL];
    for (NSString *file in tmpDirectory) {
        [[NSFileManager defaultManager] removeItemAtPath:[NSString stringWithFormat:@"%@%@", NSTemporaryDirectory(), file] error:NULL];
    }
}

Answer 2

Swift 3版本作为扩展:

extension FileManager {
    func clearTmpDirectory() {
        do {
            let tmpDirectory = try contentsOfDirectory(atPath: NSTemporaryDirectory())
            try tmpDirectory.forEach {[unowned self] file in
                let path = String.init(format: "%@%@", NSTemporaryDirectory(), file)
                try self.removeItem(atPath: path)
            }
        } catch {
            print(error)
        }
    }
}

用法示例:

FileManager.default.clearTmpDirectory()

感谢Max Maier,Swift 2版本:

func clearTmpDirectory() {
    do {
        let tmpDirectory = try NSFileManager.defaultManager().contentsOfDirectoryAtPath(NSTemporaryDirectory())
        try tmpDirectory.forEach { file in
            let path = String.init(format: "%@%@", NSTemporaryDirectory(), file)
            try NSFileManager.defaultManager().removeItemAtPath(path)
        }
    } catch {
        print(error)
    }
}

Answer 3

斯威夫特4

可能的实现之一

extension FileManager {
    func clearTmpDirectory() {
        do {
            let tmpDirURL = FileManager.default.temporaryDirectory
            let tmpDirectory = try contentsOfDirectory(atPath: tmpDirURL.path)
            try tmpDirectory.forEach { file in
                let fileUrl = tmpDirURL.appendingPathComponent(file)
                try removeItem(atPath: fileUrl.path)
            }
        } catch {
           //catch the error somehow
        }
    }
}

Answer 4

感谢马克斯·迈尔和罗曼·巴尔兹扎克。更新到 Swift 3，使用 URL 而不是字符串。

雨燕3

func clearTmpDir(){

        var removed: Int = 0
        do {
            let tmpDirURL = URL(string: NSTemporaryDirectory())!
            let tmpFiles = try FileManager.default.contentsOfDirectory(at: tmpDirURL, includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
            print("\(tmpFiles.count) temporary files found")
            for url in tmpFiles {
                removed += 1
                try FileManager.default.removeItem(at: url)
            }
            print("\(removed) temporary files removed")
        } catch {
            print(error)
            print("\(removed) temporary files removed")
        }
}

Answer 5

这适用于越狱的 iPad，但我认为这也应该适用于未越狱的设备。

-(void) clearCache
{
    for(int i=0; i< 100;i++)
    {
        NSLog(@"warning CLEAR CACHE--------");
    }
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError * error;
    NSArray * cacheFiles = [fileManager contentsOfDirectoryAtPath:NSTemporaryDirectory() error:&error];

    for(NSString * file in cacheFiles)
    {
        error=nil;
        NSString * filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:file ];
        NSLog(@"filePath to remove = %@",filePath);

        BOOL removed =[fileManager removeItemAtPath:filePath error:&error];
        if(removed ==NO)
        {
            NSLog(@"removed ==NO");
        }
        if(error)
        {
            NSLog(@"%@", [error description]);
        }
    }
}