实现加大UIButton/UITextField 的点击范围

加大 UITextField的点击范围实现代码如下：

class UITextFieldEx : UITextField {

    @IBInspectable
    var localPlaceholder: String? {
        didSet {
            if let text = localPlaceholder {
                self.placeholder = NSLocalizedString(text, comment: text)
            }
        }
    }
    
}

class UITextFieldPointInside : UITextFieldEx {
    
    override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
        var bounds = self.bounds
        let widthDelta = max(44.0 - bounds.size.width, 0)
        let heightDelta = max(44.0 - bounds.size.height, 0)
        bounds = CGRectInset(bounds, -4 * widthDelta, -4 * heightDelta)
        return CGRectContainsPoint(bounds, point)
    }
    
}

加大UIButton的 代码类似如下

class UIButtonEx : UIButton {


    @IBInspectable
    var localTitle: String? {
        didSet {
            if let text = localTitle {
                self.setTitle(NSLocalizedString(text, comment: text), forState: UIControlState.Normal)
            }
        }
    }
    
    
}

class UIButtonPointInside : UIButtonEx {

    override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
        var bounds = self.bounds
        let widthDelta = max(44.0 - bounds.size.width, 0)
        let heightDelta = max(44.0 - bounds.size.height, 0)
        bounds = CGRectInset(bounds, -0.5 * widthDelta, -0.5 * heightDelta)
        return CGRectContainsPoint(bounds, point)
    }

}

参考链接如下：

http://my.oschina.net/gejw0623/blog/362303