APRoundedButton

APRoundedButton

https://github.com/elpsk/APRoundedButton

效果:

源码:

APRoundedButton.h

//

//  Created by Alberto Pasca on 27/02/14.

//  Copyright (c) 2014 albertopasca.it. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface APRoundedButton : UIButton

@property (nonatomic, assign) int style;

@end

APRoundedButton.m

//

//  Created by Alberto Pasca on 27/02/14.

//  Copyright (c) 2014 albertopasca.it. All rights reserved.

//

#import "APRoundedButton.h"

#import <QuartzCore/QuartzCore.h>

@implementation APRoundedButton

- (void)awakeFromNib

{

  [super awakeFromNib];

  UIRectCorner corners;

  switch ( self.style )

  {

    case :

      corners = UIRectCornerBottomLeft;

      break;

    case :

      corners = UIRectCornerBottomRight;

      break;

    case :

      corners = UIRectCornerTopLeft;

      break;

    case :

      corners = UIRectCornerTopRight;

      break;

    case :

      corners = UIRectCornerBottomLeft | UIRectCornerBottomRight;

      break;

    case :

      corners = UIRectCornerTopLeft | UIRectCornerTopRight;

      break;

    case :

      corners = UIRectCornerBottomLeft | UIRectCornerTopLeft;

      break;

    case :

      corners = UIRectCornerBottomRight | UIRectCornerTopRight;

      break;

    case :

      corners = UIRectCornerBottomRight | UIRectCornerTopRight | UIRectCornerTopLeft;

      break;

    case :

      corners = UIRectCornerBottomRight | UIRectCornerTopRight | UIRectCornerBottomLeft;

      break;

    default:

      corners = UIRectCornerAllCorners;

      break;

  }

  UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:self.bounds

                                                 byRoundingCorners:corners

                                                       cornerRadii:CGSizeMake(20.0, 30.0)];

  CAShapeLayer *maskLayer = [CAShapeLayer layer];

  maskLayer.frame         = self.bounds;

  maskLayer.path          = maskPath.CGPath;

  self.layer.mask         = maskLayer;

}

@end

核心的地方:

贝塞尔曲线(矩形带圆角的那种) + CAShapeLayer + layer.mask = 上述结果