iOS.UIKit.12.UICollectionView

一、案例介绍：以集合形式展现图片，如图01

图01

二、案例步骤：

1、选择Simple View Aplication,取名cq.38.集合视图，如图02

图02

2、Main.storyboard,如图03

图03

3、events.plist，如图04，05

4、CQ38ViewController.h

#import <UIKit/UIKit.h>

@interface CQ38ViewController : UICollectionViewController

@property (strong,nonatomic) NSArray *events;

@end

5、CQ38ViewController.m

#import "CQ38ViewController.h"
#import "CQ38CollectionViewCell.h"

@interface CQ38ViewController ()

@end

@implementation CQ38ViewController


- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    NSBundle *bundle = [NSBundle mainBundle];
    NSString *plistPath = [bundle pathForResource:@"events"
                                           ofType:@"plist"];
    //获取属性列表文件中的全部数据
    NSArray *array = [[NSArray alloc] initWithContentsOfFile:plistPath];
    self.events = array;
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

#pragma mark - UICollectionViewDataSource

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return [self.events count] / 2;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return 2;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    CQ38CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
    NSDictionary *event = [self.events objectAtIndex:(indexPath.section*2 + indexPath.row)];
    cell.label.text = [event objectForKey:@"name"];
    cell.imageView.image = [UIImage imageNamed:[event objectForKey:@"image"]];
    return cell;
}

#pragma mark - UICollectionViewDelegate
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    NSDictionary *event = [self.events objectAtIndex:(indexPath.section*2 + indexPath.row)];
    NSLog(@"select event name : %@", [event objectForKey:@"name"]);
    
}
@end