将应用程序包中的文件复制到用户的应用程序支持文件夹

Question

我正在制作一个应用程序，我需要将某些文件从应用程序包复制到用户的应用程序支持文件夹。这是我实际使用的代码：

NSBundle *thisBundle = [NSBundle mainBundle];
NSString *executableName = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleExecutable"];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *userpath = [paths objectAtIndex:0];
userpath = [userpath stringByAppendingPathComponent:executableName];    // The file will go in this directory
NSString *saveFilePath = [userpath stringByAppendingPathComponent:@"db.sqlite"];
NSFileManager *fileManager = [[NSFileManager alloc] init];
[fileManager copyItemAtPath:[thisBundle pathForResource:@"db" ofType:@"sqlite"] toPath:saveFilePath error:NULL];

但这并没有复制任何东西，顺便说一句，这是一个 Mac 应用程序。

Answer 1

终于搞定了

if ([fileManager fileExistsAtPath:userpath] == NO)
    [fileManager createDirectoryAtPath:userpath withIntermediateDirectories:YES attributes:nil error:nil];

结果代码是：

NSBundle *thisBundle = [NSBundle mainBundle];

NSString *executableName = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleExecutable"];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *userpath = [paths objectAtIndex:0];
userpath = [userpath stringByAppendingPathComponent:executableName];    // The file will go in this directory
NSString *saveFilePath = [userpath stringByAppendingPathComponent:@"db.sqlite"];
NSFileManager *fileManager = [[NSFileManager alloc] init];
if ([fileManager fileExistsAtPath:userpath] == NO)
    [fileManager createDirectoryAtPath:userpath withIntermediateDirectories:YES attributes:nil error:nil];

[fileManager copyItemAtPath:[thisBundle pathForResource:@"db" ofType:@"sqlite"] toPath:saveFilePath error:NULL];

Answer 2

您可能需要仔细检查您的文件路径：

NSLog(@"src: %@", [thisBundle pathForResource:@"db" ofType:@"sqlite"]);
NSLog(@"dst: %@", saveFilePath);