多個文件複製到文檔目錄

Question

我想將多個文件從我的一個NSBundle複製到文檔目錄應用程序啓動時。

這是複製文件的代碼：

- (NSString *) getPath 
{ 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES); 
    NSString *documentsDir = [paths objectAtIndex:0]; 
    return [documentsDir stringByAppendingString:@"Photo.png"]; 
} 

- (void) copyFile 
{ 
    NSFileManager *fileManager = [NSFileManager defaultManager]; 
    NSError *error; 
    NSString *Path = [self getPath]; 
    BOOL success = [fileManager fileExistsAtPath:Path]; 

    if(!success) { 

    NSString *defaultPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Photo.png"]; 
    success = [fileManager copyItemAtPath:defaultPath toPath:Path error:&error]; 

    if (!success) 
     NSAssert1(0, @"Failed to create writable file with message '%@'.", [error localizedDescription]); 
    } 
} 

的的CopyFile方法將被稱爲在「applicationDidFinishLaunchingWithOptions」方法。但是這種方法只允許將一個文件複製到Documents目錄。如果我想從我的NSBundle複製50個文件，這是否意味着我必須指定50個路徑？有沒有簡短的方法，例如只用幾行代碼就可以獲得NSBundle中的所有文件？

Answer 1

改變你的函數的原型：

- (NSString *) getPathofFileName:(NSString*)name; 
- (void) copyFileWithName:(NSString*)name; 

Answer 2

耶相信你能做到這一點

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{ 

    NSMutableArray *filesArray = [NSMutableArray arrayWithObjects:@"0.epub",@"1.epub",@"2.epub",@"3.epub",@"4.epub",nil];//here put the name of files you want to copy 
    [self copyFilesToDocuments:filesArray]; 

    [UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackOpaque; 
    self.window.rootViewController = (UIViewController*)self.viewController; 
    [self.window makeKeyAndVisible]; 
    return YES; 
} 

- (void) copyFilesToDocuments : (NSMutableArray*)filesArr { 
    NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  NSUserDomainMask, YES) lastObject]; 

    for(int i = 0 ; i < [filesArr count] ; i++) { 
     NSString *filePath = [docDir stringByAppendingPathComponent:[filesArr objectAtIndex:i]]; 
     NSFileManager *fm = [NSFileManager defaultManager]; 
     BOOL exist = [fm fileExistsAtPath:filePath]; 
     NSError *error = nil; 

     if (!exist) { 
      NSString *path = [[[NSBundle mainBundle] resourcePath]stringByAppendingPathComponent:[filesArr objectAtIndex:i]]; 
      BOOL success = [fm copyItemAtPath:path toPath:filePath error:&error]; 
      if (!success) { 
       NSAssert1(0,@"%@",[error localizedDescription]); 
      } 
     } 
    } 
} 

Answer 3

您可以從您的資源文件夾中的所有文件複製，但我懷疑你真的想這樣做，你做？畢竟這些也是應用程序資源（如字符串文件或圖形只適用於用戶界面按鈕等）

所以你可能想要在你的資源文件夾中有一個子目錄（例如命名爲FilesToCopy）與你所有的文件要複製（如Photo.png在Contents/Resources/FilesToCopy/Photo.png找到）

爲了獲得一個目錄的內容，只需使用

NSError * err; 
NSArray * files; 
NSString * srcPath; 
NSString * dstPath; 
NSFileManager * man; 

srcPath = [self getSrcPath]; 
dstPath = [self getDstPath]; 
man = [[NSFileManager alloc] init]; 
files = [man contentsOfDirectoryAtPath:srcPath error:&err]; 

然後你就可以一次複製一個文件：

for (NSString *aFile in files) { 
    BOOL success; 

    NSString * srcFile = [srcPath stringByAppendingPathComponent:aFile]; 
    NSString * dstFile = [dstPath stringByAppendingPathComponent:aFile]; 
    success = [man copyItemAtPath:srcFile toPath:dstFile error:&err]; 
    // Verify success 
} 

現在你只需要srcPath和dstPath。

- (NSString *)getSrcPath 
{ 
    return [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"FilesToCopy"]; 
} 

- (NSString *)getDstPath 
{ 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES); 
    return [paths objectAtIndex:0]; 
}