93 lines
3.7 KiB
C
93 lines
3.7 KiB
C
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/**
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* Tencent is pleased to support the open source community by making QMUI_iOS available.
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* Copyright (C) 2016-2021 THL A29 Limited, a Tencent company. All rights reserved.
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* Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
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* http://opensource.org/licenses/MIT
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* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
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*/
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//
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// QMUICollectionViewPagingLayout.h
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// qmui
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//
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// Created by QMUI Team on 15/9/24.
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//
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#import <UIKit/UIKit.h>
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typedef NS_ENUM(NSInteger, QMUICollectionViewPagingLayoutStyle) {
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QMUICollectionViewPagingLayoutStyleDefault, // 普通模式，水平滑动
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QMUICollectionViewPagingLayoutStyleScale, // 缩放模式，两边的item会小一点，逐渐向中间放大
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QMUICollectionViewPagingLayoutStyleRotation // 旋转模式，围绕底部某个点为中心旋转
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};
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/**
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* 支持按页横向滚动的 UICollectionViewLayout，可切换不同类型的滚动动画。
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*
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* @warning item 的大小和布局仅支持通过 UICollectionViewFlowLayout 的 property 系列属性修改，也即每个 item 都应相等。对于通过 delegate 方式返回各不相同的 itemSize、sectionInset 的场景是不支持的。
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*/
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@interface QMUICollectionViewPagingLayout : UICollectionViewFlowLayout
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- (instancetype)initWithStyle:(QMUICollectionViewPagingLayoutStyle)style NS_DESIGNATED_INITIALIZER;
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@property(nonatomic, assign, readonly) QMUICollectionViewPagingLayoutStyle style;
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/**
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* 规定超过这个滚动速度就强制翻页，从而使翻页更容易触发。默认为 0.4
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*/
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@property(nonatomic, assign) CGFloat velocityForEnsurePageDown;
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/**
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* 是否支持一次滑动可以滚动多个 item，默认为 YES
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*/
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@property(nonatomic, assign) BOOL allowsMultipleItemScroll;
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/**
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* 规定了当支持一次滑动允许滚动多个 item 的时候，滑动速度要达到多少才会滚动多个 item，默认为 2.5
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*
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* 仅当 allowsMultipleItemScroll 为 YES 时生效
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*/
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@property(nonatomic, assign) CGFloat multipleItemScrollVelocityLimit;
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@end
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@interface QMUICollectionViewPagingLayout (DefaultStyle)
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/// 当前 cell 的百分之多少滚过临界点时就会触发滚到下一张的动作，默认为 .666，也即超过 2/3 即会滚到下一张。
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/// 对应地，触发滚到上一张的临界点将会被设置为 (1 - pagingThreshold)
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@property(nonatomic, assign) CGFloat pagingThreshold;
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/// 打开时，会在 collectionView.backgroundView 上添加一条红线，用来标志分页的参考点位置。仅对 Default style 有效。
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@property(nonatomic, assign) BOOL debug;
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@end
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@interface QMUICollectionViewPagingLayout (ScaleStyle)
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/**
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* 中间那张卡片基于初始大小的缩放倍数，默认为 1.0
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*/
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@property(nonatomic, assign) CGFloat maximumScale;
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/**
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* 除了中间之外的其他卡片基于初始大小的缩放倍数，默认为 0.9
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*/
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@property(nonatomic, assign) CGFloat minimumScale;
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@end
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extern const CGFloat QMUICollectionViewPagingLayoutRotationRadiusAutomatic;
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@interface QMUICollectionViewPagingLayout (RotationStyle)
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/**
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* 旋转卡片相关
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* 左右两个卡片最终旋转的角度有 rotationRadius * 90 计算出来
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* rotationRadius表示旋转的半径
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* @warning 仅当 style 为 QMUICollectionViewPagingLayoutStyleRotation 时才生效
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*/
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@property(nonatomic, assign) CGFloat rotationRatio;
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@property(nonatomic, assign) CGFloat rotationRadius;
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@end
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