iOS关于搜索不规则瀑布流布局的实现小结

　　最近在项目开发中遇到了不规则搜索布局的问题。之前常用的解决方案是用一个tableview用一个循环动态的加载，唯一的缺点是需要动态的移除，其实也已经足够。https://download.csdn.net/download/kuuailetianzi/9905316，需要的话可以下载使用。请教了一下身边的美女同事，她那边给出的思路是用UICollectionView的复用来实现。解决方案如下。

　　1、pod导入JQCollectionViewAlignLayout库

　　2、核心代码如下

　　

//此处用库对象JQCollectionViewAlignLayout

JQCollectionViewAlignLayout * layout = [[JQCollectionViewAlignLayout alloc]init];

layout.itemSize = CGSizeMake(K_CC_SCREEN_WIDTH, 40);

//此处设置行间距

layout.minimumLineSpacing = 10;

//此处设置列间距

layout.minimumInteritemSpacing = 10;

self.collectionView = [[UICollectionView alloc]initWithFrame:CGRectZero collectionViewLayout:layout];

[self.bottomView addSubview:self.collectionView];

self.collectionView.delegate = self;

self.collectionView.dataSource = self;

self.collectionView.layer.masksToBounds = YES;

self.collectionView.layer.cornerRadius = 8.0;

self.collectionView.showsVerticalScrollIndicator = NO;

self.collectionView.showsHorizontalScrollIndicator = NO;

self.collectionView.backgroundColor = [UIColor clearColor];

[self.collectionView mas_makeConstraints:^(MASConstraintMaker *make) {

make.width.mas_equalTo(K_CC_SCREEN_WIDTH);

make.bottom.mas_equalTo(self.bottomView);

make.left.mas_equalTo(0);

make.top.mas_equalTo(60);

}];

self.collectionView.contentInset = UIEdgeInsetsMake(10, 10, 10, 10);

[self.collectionView registerClass:[CCHighSeasPoolReturnCell class] forCellWithReuseIdentifier:kCellReuseIdentifier];

[self.collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:kFooterReuseIdentifier];

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

CCHighSeasPoolReturnCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kCellReuseIdentifier forIndexPath:indexPath];

NSString *codevalue= self.data[indexPath.section].items[indexPath.item].itemtitle;

//选中项索引，修改背景、文本颜色，并给变量赋值

if (indexPath.item==self.selectItemIndex) {

cell.contentView.backgroundColor = K_CC_COLOR_STRING(@"#343E79");

cell.lblTitle.textColor = K_CC_COLOR_STRING(@"#FFFFFF");

self.rejectreason=codevalue;

}else{

cell.contentView.backgroundColor = K_CC_COLOR_STRING(@"#F5F5F5");

cell.lblTitle.textColor = K_CC_COLOR_STRING(@"#333333");

}

cell.title = codevalue;

return cell;

}

//初始化数组数据

-(void)loadData{

if (!_data) {

NSMutableArray *data = [[NSMutableArray alloc] init];

//JQCollectionViewItemsVerticalAlignment verticalAlignments[] = {JQCollectionViewItemsVerticalAlignmentCenter, JQCollectionViewItemsVerticalAlignmentTop, JQCollectionViewItemsVerticalAlignmentBottom};

//设置每一项水平从左到右对齐

JQCollectionViewItemsHorizontalAlignment horizontalAlignments[] = {JQCollectionViewItemsHorizontalAlignmentCenter, JQCollectionViewItemsHorizontalAlignmentLeft, JQCollectionViewItemsHorizontalAlignmentRight, JQCollectionViewItemsHorizontalAlignmentFlow};

//JQCollectionViewItemsDirection directions[] = {JQCollectionViewItemsDirectionLTR, JQCollectionViewItemsDirectionRTL};

for (int i = 0; i < 1; i++) {

JQCollectionViewItemsHorizontalAlignment horizontal = horizontalAlignments[1];

NSInteger count = self.dataAddressList.count;

NSMutableArray *items = [[NSMutableArray alloc] init];

for (int j = 0; j < count; j++) {

UIColor *color = K_CC_COLOR_STRING(@"#F5F5F5");

NSDictionary *dic=[self.dataAddressList objectAtIndex:j];

NSString *codevalue=[dic objectForKey:@"codevalue"];

//宽度自适应

CGFloat labelW = [CCCommonAPI getWidthWithString:codevalue font:K_CC_FONT(14) constraintSize:CGSizeMake(MAXFLOAT, 40.0f)];

//此处为了给每一个项留一定的空白

CGFloat width = labelW+10;

CGSize size = CGSizeMake(width, 40);

CCHighSeasPoolReturnItemModel *item = [[CCHighSeasPoolReturnItemModel alloc] initWithColor:color size:size index:j];

item.itemtitle=codevalue;

[items addObject:item];

}

CCHighSeasPoolReturnModel *section = [[CCHighSeasPoolReturnModel alloc] init];

//                    section.verticalAlignment = vertical;

section.horizontalAlignment = horizontal;

//section.direction = JQCollectionViewItemsDirectionLTR;

section.items = items;

[data addObject:section];

//                }

//            }

_data = data;

}

}

}