59 lines
1.2 KiB
Objective-C
59 lines
1.2 KiB
Objective-C
//
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// CRBoxFlowLayout.m
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// CaiShenYe
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//
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// Created by Chobits on 2019/1/3.
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// Copyright © 2019 Chobits. All rights reserved.
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//
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#import "CRBoxFlowLayout.h"
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@implementation CRBoxFlowLayout
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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[self initPara];
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}
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return self;
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}
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- (void)initPara
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{
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self.ifNeedEqualGap = YES;
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self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
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self.minLineSpacing = 10;
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self.minimumLineSpacing = 0;
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self.minimumInteritemSpacing = 0;
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self.sectionInset = UIEdgeInsetsZero;
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self.itemNum = 1;
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}
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- (void)prepareLayout
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{
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if (_ifNeedEqualGap) {
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[self autoCalucateLineSpacing];
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}
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[super prepareLayout];
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}
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- (void)autoCalucateLineSpacing
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{
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if (self.itemNum > 1) {
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CGFloat width = CGRectGetWidth(self.collectionView.frame);
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self.minimumLineSpacing = floor(1.0 * (width - self.itemNum * self.itemSize.width - self.collectionView.contentInset.left - self.collectionView.contentInset.right) / (self.itemNum - 1));
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if (self.minimumLineSpacing < self.minLineSpacing) {
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self.minimumLineSpacing = self.minLineSpacing;
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}
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}else{
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self.minimumLineSpacing = 0;
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}
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}
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@end
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