UICollectionView

//
//  CollectionController.h
//  MGuardian
//
//  Created by krmao on 16/5/13.
//  Copyright © 2016年 krmao. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface CollectionController : UIViewController
@end
//********************************************************************************
//*自定义类 UICollectionViewCell START
//********************************************************************************
//静态变量声明定义
static NSString * __nonnull collectionCellID=@"mmcell";//可复用的reuseIdentifier
@interface MCollectionItemCellView : UICollectionViewCell
@property (weak, nonatomic) IBOutlet UILabel *mLabelView;
+ (MCollectionItemCellView * __nonnull)getCellView: (UICollectionView * __nonnull) uiCollectionView  index:(NSIndexPath * __nonnull)indexPath;
@end
//********************************************************************************
//*自定义类 UICollectionViewCell 实现
//********************************************************************************
@implementation MCollectionItemCellView
- (id __nonnull)initWithFrame:(CGRect)frame{
    self=[super initWithFrame:frame ];
    return self;
}
//静态工厂方法
+ (MCollectionItemCellView * __nonnull)getCellView: (UICollectionView * __nonnull) uiCollectionView  index:(NSIndexPath * __nonnull)indexPath;{
    MCollectionItemCellView * cellView =(MCollectionItemCellView *) [uiCollectionView dequeueReusableCellWithReuseIdentifier:collectionCellID forIndexPath:indexPath];
    //设置cell选中状态
    //cellView.selectionStyle=UITableViewCellSelectionStyleDefault;
    cellView.selectedBackgroundView=[[UIView alloc]initWithFrame:cellView.frame];
    cellView.selectedBackgroundView.backgroundColor=[UIColor greenColor];
    [cellView sizeToFit];
    return cellView;
}
@end
//********************************************************************************
//*自定义类 UICollectionViewCell END
//********************************************************************************

//
//  CollectionController.m
//  MGuardian
//
//  Created by krmao on 16/5/13.
//  Copyright © 2016年 krmao. All rights reserved.
//
#import "CollectionController.h"
@interface CollectionController ()<UICollectionViewDataSource,UICollectionViewDelegate>
@property (weak, nonatomic) IBOutlet UICollectionView *mCollectionView;
@property NSMutableArray *dataList;
@end
@implementation CollectionController
- (void)viewDidLoad {
    [super viewDidLoad];
    self.mCollectionView.dataSource=self;
    self.mCollectionView.delegate=self;
    self.dataList=[[NSMutableArray alloc]initWithObjects:   @"a",@"b",@"c",@"d",@"e",@"f",@"g",@"h",@"i",@"j",@"k",@"l",@"m",
                                                            @"n",@"o",@"p",@"q",@"r",@"s",@"t",@"u",@"v",@"w",@"x",@"y",@"z", nil];
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    return self.dataList.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    MCollectionItemCellView *celView=[MCollectionItemCellView getCellView:collectionView index:indexPath];
    celView.mLabelView.text=[NSString stringWithFormat: @"item:%i-%@",indexPath.row,[self.dataList objectAtIndex:indexPath.row]];
    return celView;
}
@end

来自为知笔记(Wiz)