43 lines
1.7 KiB
Swift
43 lines
1.7 KiB
Swift
//
|
||
// PageCollectionViewFlowLayout.swift
|
||
// DNSPageView
|
||
//
|
||
// Created by Daniels on 2018/2/24.
|
||
// Copyright © 2018 Daniels. All rights reserved.
|
||
//
|
||
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
// of this software and associated documentation files (the "Software"), to deal
|
||
// in the Software without restriction, including without limitation the rights
|
||
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
// copies of the Software, and to permit persons to whom the Software is
|
||
// furnished to do so, subject to the following conditions:
|
||
//
|
||
// The above copyright notice and this permission notice shall be included in
|
||
// all copies or substantial portions of the Software.
|
||
//
|
||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
// THE SOFTWARE.
|
||
//
|
||
|
||
import UIKit
|
||
|
||
/// 通过设置 offset 的值，达到初始化的 pageView 默认显示某一页的效果，默认显示第一页
|
||
public class PageCollectionViewFlowLayout: UICollectionViewFlowLayout {
|
||
var offset: CGFloat?
|
||
|
||
public override func prepare() {
|
||
super.prepare()
|
||
guard let offset = offset else { return }
|
||
collectionView?.contentOffset = CGPoint(x: offset, y: 0)
|
||
}
|
||
|
||
public override var flipsHorizontallyInOppositeLayoutDirection: Bool {
|
||
return true
|
||
}
|
||
}
|