將應用程序包中的文件複製到用戶的應用程序支持文件夾

Question

我正在製作應用程序，需要將應用程序包中的某個文件複製到用戶的應用程序支持文件夾。這是我實際使用的代碼：

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]; 

但是這不會複製任何東西，BTW這是一個Mac應用程序。

Answer 1

終於它與添加

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

工作而產生的代碼是：

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

您可能要仔細檢查你的文件路徑：

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