我正在使用以下代码来复制sqlite数据库,并且它工作正常。但是,当我将此代码转换为swift时,它会在Bool类型上显示错误。在Swift中复制Sqlite数据库无法正常工作
这是客观的C代码
- (void) copyDatabaseIfNeeded {
//Using NSFileManager we can perform many file system operations.
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSString *dbPath = [self getDBPath];
BOOL success = [fileManager fileExistsAtPath:dbPath];
if(!success) {
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"database.sqlite"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]);
}
}
- (NSString *) getDBPath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:@"database.sqlite"];
}
这是这是造成问题的雨燕CopyDataBase。
var fileManager = FileManager.default
var error: Error!
var dbPath = self.getDBPath()
var success = fileManager.fileExists(atPath: dbPath)
if !success {
var defaultDBPath = URL(fileURLWithPath: Bundle.main.resourcePath!).appendingPathComponent("CapalinoDataBase.sqlite").absoluteString
do {
success = try fileManager.copyItem(atPath: defaultDBPath, toPath: dbPath)
}
catch {
}
if !success {
assert(false, "Failed to create writable database file with message '\(error.localizedDescription)'.")
}
}