代码: - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. self.title=@"页面调的时候隐藏工具条"; //当跳转的时候,隐藏工具条 [self.tabBarController setHidesBottomBarWhenPushed:YES]; }
MySQL字符串比较bug: select * from table_a a left join table_b b on a.field_a = b.field_b error: Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=' cause:两表编码方式不一致. resolve:将比较等式的一边进行字符串转换,如:"CONVERT