Customize the rounded corners of the four corners of the View and the settings of the border

Use Bézier curves

typedef NS_OPTIONS(NSUInteger, UIRectCorner) {

    UIRectCornerTopLeft     = 1 << 0,

    UIRectCornerTopRight    = 1 << 1,

    UIRectCornerBottomLeft  = 1 << 2,

    UIRectCornerBottomRight = 1 << 3,

    UIRectCornerAllCorners  = ~0UL

};

//16 color

#define RGB16Color(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

 

UIButton * chooseButton = [UIButton buttonWithType:UIButtonTypeCustom];

chooseButton.frame = CGRectMake(10, 15, 86, 24);

[self.view addSubview:chooseButton];

UIBezierPath *maskPath_two = [UIBezierPath bezierPathWithRoundedRect: chooseButton.bounds byRoundingCorners:UIRectCornerTopRight | UIRectCornerBottomRight cornerRadii:CGSizeMake(5,5)];

    //Create layer

    CAShapeLayer *maskLayer_two = [[CAShapeLayer alloc] init];

    maskLayer_two.frame = chooseButton.bounds;

    //assignment

    maskLayer_two.path = maskPath_two.CGPath;

    chooseButton.layer.mask = maskLayer_two;

Set the border on the basis of the above

//set border

    CAShapeLayer *borderLayer = [CAShapeLayer layer];

    borderLayer.frame = chooseButton.bounds;

    borderLayer.path = maskPath_two.CGPath;

    borderLayer.lineWidth = 1;

    borderLayer.fillColor = [UIColor clearColor].CGColor;

    borderLayer.strokeColor = RGB16Color(0x30C26D).CGColor;

    [chooseButton.layer addSublayer:borderLayer];