1 UILabel *_label = [[UILabel alloc]initWithFrame:CGRectMake(20, self.view.frame.size.height*0.5f, self.view.frame.size.width*0.5f, 40)];
2 _label.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.6];
3 _label.textColor = [UIColor whiteColor];
4 _label.layer.cornerRadius = 5;
5 _label.layer.masksToBounds= YES;
6 _label .font = [UIFont systemFontOfSize:13];
7 _label .numberOfLines = 2;
8 _label .textAlignment = UITextAlignmentCenter;
9 _label.text = @"轻触";
10 [self.view addSubview:_label];