iOS中的瀑布流(RootCollectionViewControlle)

標籤：

用了三個第三方

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    // Override point for customization after application launch.        //建立一個負責布局的對象    UICollectionViewWaterfallLayout *waterFlow = [[UICollectionViewWaterfallLayout alloc] init];        //1.設定每個Cell的寬度    waterFlow.itemWidth = ([UIScreen mainScreen].bounds.size.width - 30) / 2;    //2.設定分區的邊框範圍    waterFlow.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);    //3.設定行和列的間距    waterFlow.minLineSpacing = 10;        RootCollectionViewController *rootVC = [[RootCollectionViewController alloc] initWithCollectionViewLayout:waterFlow];        UINavigationController *navVC = [[UINavigationController alloc] initWithRootViewController:rootVC];        //4.設定代理    waterFlow.delegate = rootVC;                            self.window.rootViewController = rootVC;    [rootVC release];    [navVC release];    [waterFlow release];                                        self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];    return YES;}

 

 

 

 

 

 

RootCollectionViewController.h服從代理

#import <UIKit/UIKit.h>#import "UICollectionViewWaterfallLayout.h"@interface RootCollectionViewController : UICollectionViewController<UICollectionViewDelegateWaterfallLayout>@end

 

#import "RootCollectionViewController.h"#import "GoodFoodCell.h"#import "AFNetworking.h"#import "GondFoot.h"#import "UIImageView+WebCache.h"#define kWidth_Cell_iamgeView   ([UIScreen mainScreen].bounds.size.width - 30) / 2@interface RootCollectionViewController ()@property (nonatomic, retain) NSMutableArray *dataSource; //資料來源@end@implementation RootCollectionViewController- (void)dealloc{    self.dataSource = nil;    [super dealloc];}- (NSMutableArray *)dataSource{    if (!_dataSource) {        self.dataSource = [NSMutableArray arrayWithCapacity:1];    }    return [[_dataSource retain] autorelease];}static NSString * const reuseIdentifier = @"Cell";- (void)viewDidLoad {    [super viewDidLoad];        // Uncomment the following line to preserve selection between presentations    // self.clearsSelectionOnViewWillAppear = NO;        // Register cell classes    [self.collectionView registerClass:[GoodFoodCell class] forCellWithReuseIdentifier:reuseIdentifier];        // Do any additional setup after loading the view.    [self getData];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}//pragma mark -- 資料處理//進行網路請求- (void)getData{    AFHTTPRequestOperationManager *manger= [AFHTTPRequestOperationManager manager];    [manger GET:@"http://api.meishixing.com/picture/picturelist/last/page=1&city_id=13&session_id=000012ccc15955056ce39798d33df97a40f1cc" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {        //資料處理        [self dataMangerFromDictionaay:responseObject];    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {            }];}//資料處理- (void)dataMangerFromDictionaay:(NSDictionary *)datadic{    NSArray *array = datadic[@"result"];    for (NSDictionary *tempDic in array) {        //將 tempDic 封裝成 OC對象        GondFoot *food = [[GondFoot alloc] init];        //使用KVC 進行賦值        [food setValuesForKeysWithDictionary:tempDic];        //將封裝好的 Model 添加到資料來源        [self.dataSource addObject:food];            }    //重新整理資料    [self.collectionView reloadData];}//每個cell高度代理- (CGFloat)collectionView:(UICollectionView *)collectionView                   layout:(UICollectionViewWaterfallLayout *)collectionViewLayout heightForItemAtIndexPath:(NSIndexPath *)indexPath{#warning 假資料    //取出對應的Model 資料    GondFoot *food = self.dataSource[indexPath.item];        return kWidth_Cell_iamgeView * food.image_height.floatValue / food.image_width.floatValue;           // return 100;}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/#pragma mark <UICollectionViewDataSource>- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {#warning Incomplete method implementation -- Return the number of sections    return 1;}- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {    return self.dataSource.count;}- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {    GoodFoodCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];        // Configure the cell        GondFoot *food = self.dataSource[indexPath.item];        [cell.imageView sd_setImageWithURL:[NSURL URLWithString:food.picture_url] placeholderImage:nil];        return cell;}

@end

 

#import "GoodFoodCell.h"@implementation GoodFoodCell- (instancetype)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (self) {        [self.contentView addSubview:self.imageView];    }    return self;}- (UIImageView *)imageView{    if (!_imageView) {        self.imageView = [[[UIImageView alloc] initWithFrame:self.bounds] autorelease];    }    return [[_imageView retain] autorelease];}- (void)layoutSubviews{    [super layoutSubviews];    self.imageView.frame = self.bounds;}- (void)dealloc{    self.imageView = nil;    [super dealloc];}@end

 

iOS中的瀑布流(RootCollectionViewControlle)