自定义圆角button

    UIButton * buttonLogin=[UIButton buttonWithType:UIButtonTypeCustom];

    buttonLogin.frame=CGRectMake(110, 180, 100, 30);

    [buttonLogin setBackgroundImage:[UIImage p_w_picpathNamed:@"top.png"] forState:UIControlStateNormal];

    [buttonLogin setTitle:@"登录" forState:UIControlStateNormal];

    //圆角

    buttonLogin.layer.cornerRadius=7;

    buttonLogin.layer.masksToBounds=YES;

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

    [buttonLogin addTarget:self action:@selector(login) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:buttonLogin];