IOS之集合视图UICollectionView
? ? ? ? 实现效果如下。
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1.往ViewController添加UICollectionView，并绑定Delegate和DataSource。
2.新建单元类BookCell，继承UICollectionViewCell
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BookCell.h
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#import <UIKit/UIKit.h>@interface BookCell : UICollectionViewCell@property (weak, nonatomic) IBOutlet UIImageView *imageView;//自定义单元控件1@property (weak, nonatomic) IBOutlet UILabel *label;//自定义单元控件2@end
?BookCell.m
#import "BookCell.h"@implementation BookCell- (id)initWithFrame:(CGRect)frame{ self = [super initWithFrame:frame]; if (self) { // Initialization code } return self;}@end?3.在Interface Builder中设置UICollectionView的Cell的class为BookCell.选中设计界面的单元格，（1）把连线连接到左边View Controller Scene的UICollectionView的Cell的UIImageView，在弹出的菜当中选择imageView（即对应BookCell的imageView变量）（2）把连线连接到左边View Controller Scene的UICollectionView的Cell的UILabel，在弹出的菜当中选择label（即对应BookCell的label变量）(3)选中UICollectionView的Cell，将identifier设置为bookCell（下面第5步会有说明）
?4.设置UICollectionView的数据源初始化。user_head.plist以及图片请见附件。
- (void)viewDidLoad{ [super viewDidLoad];// Do any additional setup after loading the view. [self initCollectionView];}-(void)initCollectionView{ NSBundle *bundle = [NSBundle mainBundle]; NSString *plistPath = [bundle pathForResource:@"user_head" ofType:@"plist"]; dataArr = [[NSArray alloc] initWithContentsOfFile:plistPath];//dataArr为.h文件定义的变量 NSLog(@"data count = %d",[dataArr count]);}?5.将数据源绑定到UICollectionView
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//显示多少行- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{ return 3;}//显示多少列- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{ return 2;}//为每个单元设置UI- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{ BookCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"bookCell" forIndexPath:indexPath];//"bookCell" 对应第三步的cell的identifier NSDictionary *dict = [dataArr objectAtIndex:(indexPath.section*2+indexPath.row)];//2为每行的个数 cell.label.text = [dict objectForKey:@"itemName"]; NSLog(@"itemName= %@",[dict objectForKey:@"itemName"]); cell.imageView.image = [UIImage imageNamed:[dict objectForKey:@"itemImagePath"]]; return cell;}?
?6.添加选择单元格之后的触发事件。
//选择单元格触发事件- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{ NSDictionary *dict = [dataArr objectAtIndex:(indexPath.section*2+indexPath.row)];//2为每行的个数 NSString *userName = [dict objectForKey:@"itemName"]; NSString *userHead = [dict objectForKey:@"itemImagePath"]; NSLog(@"userName = %@, userHead = %@", userName,userHead);}?