iOS UIButton添加圓角,添加邊框

//准備工作
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(50,50,100,40);
button.backgroundColor = [UIColor blueColor];
//關鍵語句
button.layer.cornerRadius = 2.0;//2.0是圓角的弧度，根據需求自己更改
button.layer.borderColor = [UIColor blackColor];//設置邊框顏色
button.layer.borderWidth = 1.0f;//設置邊框顏色