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add bounces property #139

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add bounces property #139

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25 changes: 22 additions & 3 deletions Source/BTNavigationDropdownMenu.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,15 @@ import UIKit
// MARK: BTNavigationDropdownMenu
open class BTNavigationDropdownMenu: UIView {

open var bounces: Bool {
get {
return self.configuration.bounces
}
set(value) {
self.configuration.bounces = value
}
}

// The color of menu title. Default is darkGrayColor()
open var menuTitleColor: UIColor! {
get {
Expand Down Expand Up @@ -460,11 +469,21 @@ open class BTNavigationDropdownMenu: UIView {

self.menuWrapper.superview?.bringSubview(toFront: self.menuWrapper)

var animationDuration: Double = self.configuration.animationDuration
var damping: CGFloat = 1.0
var velocity: CGFloat = 1.0

if self.bounces {
animationDuration *= 1.5
damping = 0.7
velocity = 0.5
}

UIView.animate(
withDuration: self.configuration.animationDuration * 1.5,
withDuration: animationDuration,
delay: 0,
usingSpringWithDamping: 0.7,
initialSpringVelocity: 0.5,
usingSpringWithDamping: damping,
initialSpringVelocity: velocity,
options: [],
animations: {
self.tableView.frame.origin.y = CGFloat(-300)
Expand Down
2 changes: 2 additions & 0 deletions Source/Internal/BTConfiguration.swift
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Expand Up @@ -24,6 +24,7 @@
import UIKit

final class BTConfiguration {
var bounces: Bool!
var menuTitleColor: UIColor?
var cellHeight: CGFloat!
var cellBackgroundColor: UIColor?
Expand Down Expand Up @@ -57,6 +58,7 @@ final class BTConfiguration {
let arrowImagePath = imageBundle?.path(forResource: "arrow_down_icon", ofType: "png")

// Default values
self.bounces = true
self.menuTitleColor = UIColor.darkGray
self.cellHeight = 50
self.cellBackgroundColor = UIColor.white
Expand Down