UICollectionView-控件的使用（初步）

<p style="margin: 10px auto; padding-top: 0px; padding-bottom: 0px; color: rgb(57, 57, 57); font-family: verdana, 'ms song', Arial, Helvetica, sans-serif; font-size: 14px; line-height: 21px; background-color: rgb(250, 247, 239);"><span style="margin: 0px; padding: 0px;">
<span style="color: rgb(57, 57, 57); font-family: verdana, 'ms song', Arial, Helvetica, sans-serif; font-size: 14px; line-height: 21px; white-space: pre; background-color: rgb(250, 247, 239);">UICollectionView</span>和 UICollectionViewController 类是iOS6 新引进的API，用于展示集合视图，布局更加灵活，可实现多列布局，用法类似于UITableView 和 UITableViewController 类。</span></p><p style="margin: 10px auto; padding-top: 0px; padding-bottom: 0px; color: rgb(57, 57, 57); font-family: verdana, 'ms song', Arial, Helvetica, sans-serif; font-size: 14px; line-height: 21px; background-color: rgb(250, 247, 239);"><span style="margin: 0px; padding: 0px;">使用UICollectionView 必须实现UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout这三个协议。</span></p>

#import "ViewController.h"


/**
 *  1.保证无错运行是开始
    2.足够简单 
 
 */
@interface ViewController ()<UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

#pragma mark UICollectionViewDataSource
//有多少组需要显示
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}
//每组中有多少数据需要显示
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return 10;
}

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

    
    [collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"A"];
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"A" forIndexPath:indexPath];
    cell.backgroundColor = [UIColor yellowColor];
    return cell;
}

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
    return CGSizeMake(200, 200);
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

UICollectionView-控件的使用（初步）

原文：http://blog.csdn.net/u012701023/article/details/48001989