ios 如何删除ios应用程序的tmp目录文件？

How to remove tmp directory files of an ios app?

提问by oniglo

I'm working on an app that uses the iPhone camera and after making several tests I've realised that it is storing all the captured videos on the tmp directory of the app. The captures don`t disappear even if the phone is restarted.

我正在开发一个使用 iPhone 相机的应用程序，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。

Is there any way to remove all these captures or is there any way to easily clean all cache and temp files?

有什么方法可以删除所有这些捕获，或者有什么方法可以轻松清理所有缓存和临时文件？

回答by Max Meier

Yes. This method works well:

是的。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];
    }
}

回答by Roman Barzyczak

Swift 3 version as extension:

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)
        }
    }
}

Example of usage:

用法示例：

FileManager.default.clearTmpDirectory()

Thanks to Max Maier, Swift 2 version:

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)
    }
}

回答by Vyacheslav

Swift 4

斯威夫特 4

One of the possible implementations

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
        }
    }
}

回答by Hardik Thakkar

Try this code to remove NSTemporaryDirectory files

试试这个代码来删除 NSTemporaryDirectory 文件

-(void)deleteTempData
{
    NSString *tmpDirectory = NSTemporaryDirectory();
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *cacheFiles = [fileManager contentsOfDirectoryAtPath:tmpDirectory error:&error];
    for (NSString *file in cacheFiles)
    {
        error = nil;
        [fileManager removeItemAtPath:[tmpDirectory stringByAppendingPathComponent:file] error:&error];
    }
}

and to check data remove or not write code in didFinishLaunchingWithOptions

并检查数据删除或不在 didFinishLaunchingWithOptions 中编写代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    [self.window makeKeyAndVisible];

    NSString *tmpDirectory = NSTemporaryDirectory();
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *cacheFiles = [fileManager contentsOfDirectoryAtPath:tmpDirectory error:&error];
    NSLog(@"TempFile Count ::%lu",(unsigned long)cacheFiles.count);

    return YES;
}

回答by Jorge Ramírez

Thanks to Max Maier and Roman Barzyczak. Updated to Swift 3, using URLs instead of strings.

感谢 Max Maier 和 Roman Barzyczak。更新到 Swift 3，使用 URL 而不是字符串。

Swift 3

斯威夫特 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")
        }
}

回答by user1105951

This works on a jailbroken iPad, but I think this should work on a non-jailbroken device also.

这适用于越狱的 iPad，但我认为这也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]);
        }
    }
}