iOS 推荐标签_长度不等_collection布局

这里实现一个文字长度不等的collection布局, 可以做推荐等
先上效果

使用方法如下:

#import "ViewController.h"#import "ItemData.h"#import "EqualSpaceFlowLayout.h"#import "CustomCollectionViewCell.h"#import "NSString+Extension.h"@interface ViewController ()<EqualSpaceFlowLayoutDelegate,UICollectionViewDelegate,UICollectionViewDataSource>@property (nonatomic,strong) UICollectionView *collectionView;@property (nonatomic,strong) NSMutableArray *dataArray;@property (nonatomic,strong) UIButton *selectCellBtn;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    NSString *str = @"Corey_Jia";    self.dataArray = [[NSMutableArray alloc] init];    for (int i = 0;i < 50;i++) {        ItemData *itemData = [[ItemData alloc] init];        itemData.content = [str substringToIndex:arc4random()%9];        itemData.size = [itemData.content sizeWithFont:[UIFont systemFontOfSize:13]];        itemData.index = i;        [self.dataArray addObject:itemData];    }    EqualSpaceFlowLayout *flowLayout = [[EqualSpaceFlowLayout alloc] init];    flowLayout.delegate = self;    self.collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 50, CGRectGetWidth(self.view.frame), CGRectGetHeight(self.view.frame)) collectionViewLayout:flowLayout];    self.collectionView.backgroundColor = [UIColor whiteColor];    self.collectionView.delegate = self;    self.collectionView.dataSource = self;    self.collectionView.bounces = NO;    [self.view addSubview:self.collectionView];    [self.collectionView registerClass:[CustomCollectionViewCell class] forCellWithReuseIdentifier:@"CellIdentifier"];    //获取某个cell  假如需要根据最后一个cell的frame来设置view的高度  可以这么获取    UICollectionViewCell *cell = [self collectionView:self.collectionView cellForItemAtIndexPath:[NSIndexPath indexPathForRow:49 inSection:0]];    CGFloat collectionViewHeight = CGRectGetMaxY(cell.frame);}#pragma mark -- UICollectionViewDataSource//定义展示的UICollectionViewCell的个数-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{    return [self.dataArray count];}//定义展示的Section的个数-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{    return 1;}//每个UICollectionView展示的内容-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{    static NSString *moreCellIdentifier = @"CellIdentifier";    CustomCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:moreCellIdentifier forIndexPath:indexPath];    ItemData *itemData = [self.dataArray objectAtIndex:[indexPath row]];    [cell.titleBtn setTitle:[NSString stringWithFormat:@"%@ >",itemData.content] forState:UIControlStateNormal];    [cell.titleBtn addTarget:self action:@selector(cellClickWithBtn:) forControlEvents:UIControlEventTouchUpInside];    cell.titleBtn.tag = itemData.index;    return cell;}#pragma mark --UICollectionViewDelegateFlowLayout//定义每个UICollectionView 的大小- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{    ItemData *itemData = [self.dataArray objectAtIndex:[indexPath row]];    return CGSizeMake(itemData.size.width+20, 32);}- (void)cellClickWithBtn:(UIButton *)button{    //需要点击后做的事    button.selected = YES;}@end

下载地址:http://download.csdn.net/detail/corey_jia/9425824