// 用UIBezierPath 畫一個長方形, 你可自行更改坐標
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:btnView.bounds byRoundingCorners:UIRectCornerAllCorners
cornerRadii:radius];
// 用UIBezierPath 畫一個長方形, 你可自行更改坐標
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:btnView.bounds byRoundingCorners:UIRectCornerAllCorners
cornerRadii:radius];