将工程中的文件写入到应用程序中得Documents文件下

NSString*dbSourceFile = [[NSBundlemainBundle]pathForResource:@"symptom_sqlite3"ofType:@"db"];
        NSData * data = [NSDatadataWithContentsOfFile:dbSourceFile];
       
        NSString * aimPath = [NSHomeDirectory()stringByAppendingPathComponent:@"Documents/symptom_sqlite3.db"];
       
        BOOL success;
       
            if (data) {
                success = [data writeToFile:aimPathatomically:YES];
            }