iOS--圆角按钮

//进入按钮
    UIButton *enterMainButton = [[UIButton alloc] initWithFrame:CGRectMake(65, self.PageHeight-120,250 , 45)];
    enterMainButton.layer.borderWidth = 1;
    enterMainButton.layer.cornerRadius = 24;
    enterMainButton.layer.borderColor = [UIColor colorWithRed:108/255.0 green:122/255.0 blue:149/255.0 alpha:1].CGColor;
    [enterMainButton setTitle:@"进入应用" forState:UIControlStateNormal];
    enterMainButton.titleLabel.font = [UIFont systemFontOfSize: 14.0];
    [enterMainButton setTitleColor:[UIColor colorWithRed:108/255.0 green:122/255.0 blue:149/255.0 alpha:1]forState:UIControlStateNormal];

    enterMainButton.showsTouchWhenHighlighted = YES;
    enterMainButton.alpha = 0;

    [enterMainButton addTarget:self action:@selector(intoButtonClick:) forControlEvents:UIControlEventTouchUpInside];

    [UIView animateWithDuration:3.0 animations:^{
        enterMainButton.alpha = 1.0;
    }];