IOS realizes horizontal waterfall flow _ios

Effect

Source: Https://github.com/YouXianMing/Animations

GRIDFLOWLAYOUTVIEWCONTROLLER.M//animations////Created by youxianming on 16/5/5. COPYRIGHT©2016 year youxianming.
All rights reserved. #import "GridFlowLayoutViewController.h" #import "uiview+setrect.h" #import "GridLayout.h" #import "FlowStyleCell.h
"#import" FileManager.h #import "nsstring+md5.h" #import "Nsdata+jsondata.h" #import "ResponseData.h" #import "MATH.H"

#import "GCD.h" static nsstring *picturessource = @ "http://www.duitang.com/album/1733789/masn/p/0/50/"; @interface Gridflowlayoutviewcontroller () <uicollectionviewdatasource, Uicollectionviewdelegate,
Gridlayoutdelegate> @property (nonatomic, strong) Uicollectionview *collectionview;
@property (nonatomic) cgfloat rowHeight;
@property (nonatomic, strong) Nsmutablearray *datas;
@property (nonatomic, strong) ResponseData *picturesdata;

@property (nonatomic, strong) Nsmutablearray <waterfallpicturemodel *> *datasource;
 
@end @implementation Gridflowlayoutviewcontroller-(void) Setup { [Super Setup];
 
 _datasource = [Nsmutablearray new];
 Initialize the layout file cgfloat gap = 1;
 Nsinteger rowcount = arc4random ()% 3 + 2;
 _rowheight = (Self.contentView.height-(rowcount + 1) * gap)/(cgfloat) rowcount;
 GridLayout *layout = [GridLayout new];
 Layout.manager.edgeInsets = Uiedgeinsetsmake (Gap, Gap, Gap, Gap);
 Layout.manager.gap = Gap;
 
 Layout.delegate = self;
 Nsmutablearray *rowheights = [Nsmutablearray array];
 for (int i = 0; i < rowcount i++) {[Rowheights addobject:@ (_rowheight)];
 
 } layout.manager.rowHeights = Rowheights; Self.collectionview = [[Uicollectionview alloc] InitWithFrame:self.contentView.bounds Collection
 Viewlayout:layout];
 Self.collectionView.delegate = self;
 Self.collectionView.dataSource = self;
 Self.collectionView.backgroundColor = [Uicolor Clearcolor];
 Self.collectionView.showsHorizontalScrollIndicator = NO;
 Self.collectionView.alpha = 0; [Self.collectionview registerclass:[fLowstylecell class] forcellwithreuseidentifier:@ "Flowstylecell"];
 
 [Self.contentview AddSubview:self.collectionView];
  Get data [gcdqueue executeinglobalqueue:^{nsstring *string = [Picturessource lowermd532bitstring];
  NSString *realfilepath = [FileManager therealfilepath:[nsstring stringwithformat:@ "~/Documents/%@", string]];
  
  NSData *data = nil; if ([filemanager fileexistwithrealfilepath:realfilepath] = NO) {data = [[NSData alloc] Initwithcontentsofurl:[nsu
   RL Urlwithstring:picturessource]];
   
  [Data Writetofile:realfilepath Atomically:yes];
  else {data = [NSData Datawithcontentsoffile:realfilepath];
  
  } nsdictionary *datadic = [data Tolistproperty];
   [Gcdqueue executeinmainqueue:^{self.picturesdata = [[ResponseData alloc] initwithdictionary:datadic]; if (Self.picturesData.success.integerValue = = 1) {for (int i = 0; i < Self.picturesData.data.blogs.count; i++ ) {[_datasource addObject:self.picturesDaTa.data.blogs[i]];
    } [_collectionview Reloaddata];
    [UIView animatewithduration:0.5f animations:^{_collectionview.alpha = 1.f;
   }];
 }
  }];
}]; }-(Nsinteger) CollectionView: (Uicollectionview *) CollectionView numberofitemsinsection: (NSInteger) Section {return s
Elf.dataSource.count; }-(Uicollectionviewcell *) CollectionView: (Uicollectionview *) CollectionView Cellforitematindexpath: (NSIndexPath *)
 
 Indexpath {Waterfallpicturemodel *picturemodel = _datasource[indexpath.row]; Flowstylecell *cell = [CollectionView dequeuereusablecellwithreuseidentifier:@ "Flowstylecell" ForIndexPath:
 Indexpath];
 Cell.indexpath = Indexpath;
 Cell.data = Picturemodel;
 Cell.rowheight = _rowheight;
 
 [Cell loadcontent];
return cell; }-(CGFloat) Itemwidthwithindexpath: (Nsindexpath *) Indexpath {Waterfallpicturemodel *picturemodel = _dataSource[index
 
 Path.row]; return [Math resetfromsize:cgsizemake (PictureModel.iwd.floatValue, PictureModel.iht.floatValue)
    Withfixedheight:_rowheight].width; 

 } @end

Details
Inherit Uicollectionviewlayout

Four ways to Overload Uicollectionviewlayout

Partial Implementation Details

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