按钮添加边框和边框色

//按钮边框宽度

[_numberButton.layer setBorderColor:[UIColor colorWithRed:28/255.0 green:162/255.0 blue:66/255.0 alpha:1].CGColor];

[_numberButton.layer setBorderWidth:1];

[_numberButton.layer setMasksToBounds:YES];

_numberButton.backgroundColor = [UIColor whiteColor];

//设置圆角

_numberButton.layer.cornerRadius = 5;

_numberButton.clipsToBounds = YES;

_numberButton.titleLabel.font = [UIFont systemFontOfSize:13];