Waterfall Stream in iOS (Rootcollectionviewcontrolle)

Used three third-party

-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchoptions {Self.window=[[[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]] autorelease]; //Override point for customization after application launch. //create an object that is responsible for the layoutUicollectionviewwaterfalllayout *waterflow =[[Uicollectionviewwaterfalllayout alloc] init]; //1. Set the width of each cellWaterflow.itemwidth = ([UIScreen mainscreen].bounds.size.width- -) /2; //2. Set the border range of a partitionWaterflow.sectioninset = Uiedgeinsetsmake (Ten,Ten,Ten,Ten); //3. Set the spacing between rows and columnsWaterflow.minlinespacing =Ten; Rootcollectionviewcontroller*ROOTVC =[[Rootcollectionviewcontroller alloc] initwithcollectionviewlayout:waterflow]; Uinavigationcontroller*NAVVC =[[Uinavigationcontroller alloc] INITWITHROOTVIEWCONTROLLER:ROOTVC]; //4. Setting up the agentWaterflow.Delegate=ROOTVC; Self.window.rootViewController=ROOTVC;    [ROOTVC release];    [NAVVC release];                                        [Waterflow release]; Self.window.backgroundColor=[Uicolor Whitecolor];    [Self.window makekeyandvisible]; returnYES;}

RootCollectionViewController.h obey the agent

#import <UIKit/UIKit.h>"UICollectionViewWaterfallLayout.h"@ Interface Rootcollectionviewcontroller:uicollectionviewcontroller< uicollectionviewdelegatewaterfalllayout>@end

#import"RootCollectionViewController.h"#import"GoodFoodCell.h"#import"AFNetworking.h"#import"GondFoot.h"#import"uiimageview+webcache.h"#defineKwidth_cell_iamgeview ([UIScreen mainscreen].bounds.size.width-30)/2@interface Rootcollectionviewcontroller () @property (nonatomic, retain) Nsmutablearray*datasource;//Data Source@end @implementation Rootcollectionviewcontroller- (void) dealloc{Self.datasource=Nil; [Super Dealloc];}-(Nsmutablearray *) datasource{if(!_datasource) {Self.datasource= [Nsmutablearray arraywithcapacity:1]; }    return[[_datasource retain] autorelease];}StaticNSString *ConstReuseidentifier =@"Cell";- (void) viewdidload {[Super viewdidload]; //uncomment the following line to preserve selection between presentations//self.clearsselectiononviewwillappear = NO; //Register Cell Classes[Self.collectionview Registerclass:[goodfoodcellclass] Forcellwithreuseidentifier:reuseidentifier]; //Do any additional setup after loading the view.[self getData];}- (void) didreceivememorywarning {[Super didreceivememorywarning]; //Dispose of any resources the can be recreated.}//pragma mark--Data processing//make a network request- (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) {        //Data Processing[self datamangerfromdictionaay:responseobject]; } Failure:^ (Afhttprequestoperation *operation, Nserror *error) {            }];}//Data Processing- (void) Datamangerfromdictionaay: (Nsdictionary *) datadic{Nsarray*array = datadic[@"result"];  for(Nsdictionary *tempdicinchArray) {        //encapsulating tempdic into OC objectsGondfoot *food =[[Gondfoot alloc] init]; //use KVC to assign values[Food setvaluesforkeyswithdictionary:tempdic]; //Add the encapsulated Model to the data source[Self.datasource Addobject:food]; }    //Refresh Data[Self.collectionview reloaddata];}//per cell height proxy-(CGFloat) CollectionView: (Uicollectionview *) CollectionView layout: (Uicollectionviewwaterfalllayout*) collectionviewlayout Heightforitematindexpath: (Nsindexpath*) indexpath{#warningFalse data//Take out the corresponding model dataGondfoot *food =Self.datasource[indexpath.item]; returnKwidth_cell_iamgeview * Food.image_height.floatValue/Food.image_width.floatValue; //return;}/*#pragma mark-navigation//in a storyboard-based application, you'll often want to do a little preparation before n avigation-(void) Prepareforsegue: (Uistoryboardsegue *) Segue Sender: (ID) Sender {//Get the new view controller using [s]    Egue Destinationviewcontroller]. Pass the selected object to the new view controller.}*/#pragmaMark <uicollectionviewdatasource>-(Nsinteger) Numberofsectionsincollectionview: (UICollectionView *) CollectionView {#warningIncomplete method Implementation--Return the number of sectionsreturn 1;}-(Nsinteger) CollectionView: (Uicollectionview *) CollectionView numberofitemsinsection: (nsinteger) Section {returnSelf.dataSource.count;}-(Uicollectionviewcell *) CollectionView: (Uicollectionview *) CollectionView Cellforitematindexpath: (NSIndexPath *) Indexpath {Goodfoodcell*cell =[CollectionView dequeuereusablecellwithreuseidentifier:reuseidentifier Forindexpath:indexpath]; //Configure the cellGondfoot*food =Self.datasource[indexpath.item];        [Cell.imageview Sd_setimagewithurl:[nsurl URLWithString:food.picture_url] placeholderimage:nil]; returnCell;}

@end

#import"GoodFoodCell.h"@implementation Goodfoodcell-(Instancetype) initWithFrame: (cgrect) frame{ Self=[Super Initwithframe:frame]; if(self) {[Self.contentview AddSubview:self.imageView]; }    returnSelf ;}-(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

Waterfall Stream in iOS (Rootcollectionviewcontrolle)