瀑布流
#import "ViewController.h"
//网格第三方
#import<XRWaterfallLayout.h>
//sdwebimage
#import<UIImageView+WebCache.h>
//单元格样式类
#import "CollectionViewCell.h"
//模型类#import "Model.h"
//签署协议
@interface ViewController()<UICollectionViewDelegate,UICollectionViewDataSource,XRWaterfallLayoutDelegate>{
NSInteger i;
UICollectionView *collec;
}
@property(nonatomic,strong)NSMutableArray *arr;
@end
static NSString *cellID = @"celll";
@implementation ViewController
//懒加载数组
-(NSMutableArray *)arr
{
if (!_arr) {
//初始化数组
_arr = [[NSMutableArray alloc] init];
//读取plist文件当中的数据
NSString *path = [[NSBundle mainBundle] pathForResource:@"1" ofType:@"plist"];
//数据存储到arr1当中
NSArray *arr1 = [[NSArray alloc] initWithContentsOfFile:path];
//遍历数组字典转模型
for (NSDictionary *dic in arr1) {
Model *mm = [Model imagedata:dic];
//将model添加到数组
[_arr addObject:mm];
}
}
return _arr;
}
- (void)viewDidLoad {
[super viewDidLoad];
i = 1;
//初始化导航栏按钮
UIBarButtonItem *right = [[UIBarButtonItem alloc] initWithTitle:@"ADD" style:UIBarButtonItemStylePlain target:self action:@selector(add)];
self.navigationItem.rightBarButtonItem = right;
//声明瀑布流有几列
XRWaterfallLayout *layout = [XRWaterfallLayout waterFallLayoutWithColumnCount:3];
//单元格之间的间距
[layout setColumnSpacing:5 rowSpacing:5 sectionInset:UIEdgeInsetsMake(10, 10, 10, 10)];
//签署代理
layout.delegate =self;
collec = [[UICollectionView alloc] initWithFrame:[UIScreen mainScreen].bounds collectionViewLayout:layout];
collec.delegate =self;
collec.dataSource = self;
collec.backgroundColor = [UIColor whiteColor];
[self.view addSubview:collec];
[collec registerNib:[UINib nibWithNibName:@"CollectionViewCell" bundle:nil] forCellWithReuseIdentifier:cellID];
}
//添加按钮点击事件
-(void)add
{
i++;
if (i>_arr.count) {
UIAlertView *aler = [[UIAlertView alloc] initWithTitle:@"提示" message:@"已经到底了" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:@"取消", nil];
[aler show];
}
else
{
[collec reloadData];
}
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return i;
}
- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];
cell.mm = self.arr[indexPath.item];
return cell;
}
- (CGFloat)waterfallLayout:(XRWaterfallLayout *)waterfallLayout itemHeightForWidth:(CGFloat)itemWidth atIndexPath:(NSIndexPath *)indexPath
{
Model *mm = self.arr[indexPath.item];
return mm.h/mm.w*itemWidth;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
