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IOS仿微信朋友圈好友展示

前几天小伙伴要帮他做一个群聊功能,里面有好友列表,要求和微信的差不多(见下图),让小伙伴自己实现了下，他将CollectionView放在tableView的tableHead中,可是当添加好友或删除好友刷新数据源的时候并没有效果。让他将CollectionView放在tableView的cell中,结果是数据刷新了可是还是有问题删除后刷新数据时CollectionView的高度变的有问题,我就调了下,实现比较简单,只是一些细节问题,现在效果还蛮不错的,分享一下.

IOS仿微信朋友圈好友展示

1.定义CollectionViewCell,并为删除按钮添加一个block

IOS仿微信朋友圈好友展示

2.用TableView＋CollectionView显示此时注意:计算CollectionView的高度时,要注意行数是整数而且要有余进1

#import "ViewController.h" #import "CustomTableViewCell.h" #import "TKQunSheZhiCollectionViewCell.h" @interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout> {  UITableView *_mTableView;  CGFloat _imgHeight;  UICollectionView *_mCollectionView;  NSMutableArray *_mDataArray; } @end @implementation ViewController - (void)viewDidLoad {  [super viewDidLoad];  [self initTableView];  _mDataArray = [NSMutableArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5",@"3",@"4",@"5", nil]; } //----------TableView--- - (void)initTableView {  _mTableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStyleGrouped];  _mTableView.delegate = self;  _mTableView.dataSource = self;  [self.view addSubview:_mTableView]; } //UITableViewDelegate,UITableViewDataSource - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {  return 3; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {  return 1; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {  if (indexPath.section == 0) {   static NSString *cellIdentifier = @"UITableViewCell";   UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];   if (cell == nil) {    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];   }   if (_mCollectionView) {    [_mCollectionView removeFromSuperview];   }   [cell.contentView addSubview:[self createCollectionView]];   return cell;  }else{   static NSString *cellStr = @"customCell";   CustomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellStr];   if (cell == nil) {    cell = [[[NSBundle mainBundle] loadNibNamed:@"CustomTableViewCell" owner:nil options:nil] lastObject];   }   cell.nameLabel.text = @"AAA";   return cell;  } } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {  if (indexPath.section == 0) {   float height=((self.view.frame.size.width - 50)/4 + 30) * ((int)(_mDataArray.count + 4)/4) + 20;   return height;  }else{   return 44;  } } - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {  return 0.001; } //---------CollectionView---- - (UICollectionView *)createCollectionView {  UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];  _imgHeight = (self.view.frame.size.width - 50)/4;  layout.itemSize = CGSizeMake((self.view.frame.size.width - 50)/4, _imgHeight + 20);  layout.minimumLineSpacing = 10;  layout.minimumInteritemSpacing = 10;  layout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);  _mCollectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, ((_imgHeight + 30) * ((int)(_mDataArray.count + 4)/4)) + 20) collectionViewLayout:layout];  _mCollectionView.delegate = self;  _mCollectionView.dataSource = self;  _mCollectionView.backgroundColor = [UIColor whiteColor];  _mCollectionView.scrollEnabled = NO;  [_mCollectionView registerNib:[UINib nibWithNibName:@"TKQunSheZhiCollectionViewCell" bundle:nil] forCellWithReuseIdentifier:@"TKQunSheZhiCollectionViewCell"];  return _mCollectionView; } //UICollectionViewDataSource,UICollectionViewDelegate - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {  return 1; } - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {  return _mDataArray.count + 1; } - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {  NSLog(@"%@",indexPath); } - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {  TKQunSheZhiCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"TKQunSheZhiCollectionViewCell" forIndexPath:indexPath];  if (indexPath.row < 1) {   cell.mNickName.hidden = YES;   cell.mDelBtn.hidden = YES;   if (indexPath.row == 0) {    cell.mHeadImg.image = [UIImage imageNamed:@"qunzu-jiahao"];   }   else if (indexPath.row == 1){    cell.mHeadImg.image = [UIImage imageNamed:@"qunzu-jianhao"];   }  }else{   cell.delMemberBlock = ^()   {    [_mDataArray removeLastObject];    [_mTableView reloadData];   };  }  return cell; } - (void)didReceiveMemoryWarning {  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated. } @end