01-08 UICollectionView 例子
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#import "TimeCollectionCell.h"
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#import <UIKit/UIKit.h>
typedef void (^ReturnBlock)(NSString *showText);
@interface TimeCollectionCell : UICollectionViewCell
@property (nonatomic,strong)UILabel *timeLab;
@property(nonatomic,strong) UIButton *btn;
@property (nonatomic, copy) ReturnBlock returnTextBlock;
- (void)returnText:(ReturnBlock)block;
@end
- #import "TimeCollectionCell.m"
-
#import "TimeCollectionCell.h"
@implementation TimeCollectionCell
- (instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
// self.timeLab = [[UILabel alloc] initWithFrame:self.contentView.bounds];
// self.timeLab = [[UILabel alloc] initWithFrame:CGRectMake(5, 5,40 , 40)];
//
//// _timeLab.backgroundColor = [UIColor lightGrayColor];
// _timeLab.backgroundColor=[UIColor redColor];
// _timeLab.font =[UIFont systemFontOfSize:15];
// _timeLab.textAlignment = NSTextAlignmentCenter;
// [self.contentView addSubview:self.timeLab];
_btn=[[UIButton alloc]initWithFrame:CGRectMake(5, 5, 40 , 40)];
_btn.backgroundColor=[UIColor redColor];
[_btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.contentView addSubview:_btn];
}
return self;
}
-(void)btnClick:(UIButton *)btn{
NSLog(@"hh");
if (self.returnTextBlock != nil) {
self.returnTextBlock(@"你好！");
}
}
-(void)returnText:(ReturnBlock)block{
self.returnTextBlock = block;
}
#pragma mark lizi
/*
#import "YYimageCell.h"
@interface YYimageCell ()
@property(nonatomic,strong)UIImageView *imageView;
@end
@implementation YYimageCell
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
UIImageView *imageView=[[UIImageView alloc]init];
[self addSubview:imageView];
self.imageView=imageView;
}
return self;
}
-(void)setIcon:(NSString *)icon
{
_icon=[icon copy];
self.imageView.image=[UIImage imageNamed:icon];
}
-(void)layoutSubviews
{
[super layoutSubviews];
self.imageView.frame=self.bounds;
}
*/
@end
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#import "AppDelegate.h"
#import "GzCollectionViewController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
_window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
GzCollectionViewController *cc=[GzCollectionViewController new];
UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:cc];
_window.rootViewController=nav;
[_window makeKeyAndVisible];
return YES;
}
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主函数
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#import "GzCollectionViewController.h"
#import "TimeCollectionCell.h"
@interface GzCollectionViewController ()<UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout>{
UICollectionView *_collectionView;
}
@end
#define SCREENW [UIScreen mainScreen].bounds.size.width
#define SCREENH [UIScreen mainScreen].bounds.size.height
@implementation GzCollectionViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor yellowColor];
self.title=@"瀑布流";
#pragma mark http://www.cnblogs.com/wendingding/p/3888797.html 文顶顶 http://www.cnblogs.com/wendingding/p/3888642.html http://www.cnblogs.com/wendingding/p/3890953.html
UICollectionViewFlowLayout *flowLayOut = [[UICollectionViewFlowLayout alloc]init];
// [flowLayOut setItemSize:CGSizeMake((SCREENW - 20)/6, 30)];
// [flowLayOut setItemSize:CGSizeMake(200, 100)];
flowLayOut.sectionInset = UIEdgeInsetsMake(5, 5, 5, 5);
_collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 0, SCREENW, SCREENH) collectionViewLayout:flowLayOut];
_collectionView.dataSource = self;
_collectionView.delegate = self;
_collectionView.backgroundColor = [UIColor yellowColor];
[self.view addSubview:_collectionView];
[_collectionView registerClass:[TimeCollectionCell class] forCellWithReuseIdentifier:@"cell"];
// 6 [self.collectinView registerNib:[UINib nibWithNibName:@"YYcell" bundle:nil] forCellWithReuseIdentifier:YYIDCell];
}
-(void)preference{
/*'''
50 //默认处于第0组的第500个模型的左边
51 // [self.collectinView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:500 inSection:0] atScrollPosition:UICollectionViewScrollPositionLeft animated:YES];
52
53 [self.collectinView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:50] atScrollPosition:UICollectionViewScrollPositionLeft animated:YES];
//3）通过动画滚动到下一个位置
37 [self.collectinView scrollToItemAtIndexPath:nextIndexPath atScrollPosition:UICollectionViewScrollPositionLeft animated:YES];
*/
}
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 2 ;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return 5;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
static NSString *identifier = @"cell";
//也可以 向tableviewcell 那样的在这里面写，但是可能会出错 （可能会出错的点 好像是三点 ？？？）
TimeCollectionCell *cell =(TimeCollectionCell*) [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
cell.layer.borderColor = [UIColor lightGrayColor].CGColor;
cell.layer.borderWidth = 2;
//
// cell.timeLab.backgroundColor =[UIColor whiteColor];
cell.backgroundColor =[UIColor greenColor];
// cell.timeLab.textColor=[UIColor redColor];
// cell.timeLab.text = @"200";
[cell.btn setTitle:@"200" forState:UIControlStateNormal];
__block NSString *reStr;
[cell returnText:^(NSString *showText) {
reStr=showText;
}];
// NSLog(@"....heihei......");
return cell ;
}
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
NSLog(@"嘿嘿 选中了 ！！！");
}
//定义每个UICollectionView 的大小
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
// return CGSizeMake((SCREENW - 10)/5, 26);
return CGSizeMake(60,60);
}
//- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{
// return 0;
//}
//- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{
// return 0;
//}
@end
