iOS implementation drop-down refresh, pull-up load

1. Custom cell

#import "EnjoyListModel.h"

@protocol enjoycollectioncellofviewdelegate <NSObject>

-(void) Freebuttondelegateaction: (UIButton *) sender;

@end

@interface Enjoycollectioncellofview:uicollectionviewcell

@property (Nonatomic,strong) id<enjoycollectioncellofviewdelegate>delegate;

/* Free Button * * *

@property (Nonatomic,strong) UIButton *freebutton;

-(void) Updateenjoycollectioncellofviewmodel: (Enjoylistmodel *) model;

@end

. m file implementations

#import "EnjoyCollectionCellOfView.h"

#import "Masonry.h"

#import "Uiimageview+webcache.h"

#define ENJOYCOLLECTIONVIEWLEFTMARGIN 0

#define ENJOYCOLLECTIONVIEWTOPMARGIN 0

@interface Enjoycollectioncellofview ()

/* Product Picture */

@property (Nonatomic,strong) Uiimageview *goodsimageview;

/* Product Name */

@property (Nonatomic,strong) UILabel *goodstitlelabel;

/* Earnings and names */

@property (Nonatomic,strong) UILabel *goodslastlabel;

@end

@implementation Enjoycollectioncellofview

-(Instancetype) initWithFrame: (CGRect) frame

{

self = [super Initwithframe:frame];

if (self)

{

Self.backgroundcolor = [Uicolor Whitecolor];

__weak __typeof (&*self) weakself = self;

[Self.contentview AddSubview:self.goodsImageView];

[Self.goodsimageview mas_makeconstraints:^ (Masconstraintmaker *make)

{

Make.left.mas_equalTo (weakself.mas_left). Offset (enjoycollectionviewleftmargin);

Make.top.mas_equalTo (weakself.mas_top). Offset (enjoycollectionviewtopmargin);

Make.width.mas_equalTo (weakSelf.contentView.mas_width). Offset (0);

Make.height.mas_equalTo (weakSelf.contentView.mas_width). Offset (0);

}];

[Self.contentview AddSubview:self.goodsTitleLabel];

[Self.goodstitlelabel mas_makeconstraints:^ (Masconstraintmaker *make)

{

Make.left.mas_equalTo (weakself.mas_left). Offset (enjoycollectionviewleftmargin);

Make.right.mas_equalTo (weakself.mas_right). Offset (-enjoycollectionviewleftmargin);

Make.top.mas_equalTo (WeakSelf.goodsImageView.mas_bottom). Offset (0);

Make.height.mas_offset (20);

}];

[Self.contentview AddSubview:self.goodsLastLabel];

[Self.goodslastlabel mas_makeconstraints:^ (Masconstraintmaker *make)

{

Make.left.mas_equalTo (weakself.mas_left). Offset (enjoycollectionviewleftmargin);

Make.right.mas_equalTo (weakself.mas_right). Offset (-enjoycollectionviewleftmargin);

Make.top.mas_equalTo (WeakSelf.goodsTitleLabel.mas_bottom). Offset (0);

Make.height.mas_offset (20);

}];

[Self.contentview AddSubview:self.freeButton];

[Self.freebutton mas_makeconstraints:^ (Masconstraintmaker *make)

{

Make.left.mas_equalTo (weakself.mas_left). Offset (35);

Make.right.mas_equalTo (weakself.mas_right). Offset (-35);

Make.bottom.mas_equalTo (WeakSelf.contentView.mas_bottom). Offset (-10);

Make.height.mas_offset (30);

}];

[Self.freebutton addtarget:self Action: @selector (freebuttonaction:) forcontrolevents:uicontroleventtouchupinside] ;

}

return self;

}

#pragma mark-buttonaction

-(void) Freebuttonaction: (UIButton *) sender

{

if ([Self.delegate respondstoselector: @selector (freebuttondelegateaction:)])

{

[Self.delegate Freebuttondelegateaction:sender];

}

}

#pragma mark-updateui

#pragma mark--lazy

-(Uiimageview *) Goodsimageview

{

if (!_goodsimageview)

{

_goodsimageview = [[Uiimageview alloc]init];

_goodsimageview.backgroundcolor = [Uicolor Redcolor];

}

return _goodsimageview;

}

-(UILabel *) Goodstitlelabel

{

if (!_goodstitlelabel) {

_goodstitlelabel = [[UILabel alloc]init];

_goodstitlelabel.text = @ "Product name";

_goodstitlelabel.backgroundcolor = [Uicolor Lightgraycolor];

_goodstitlelabel.textalignment = Nstextalignmentcenter;

_goodstitlelabel.font = [Uifont systemfontofsize:12];

}

return _goodstitlelabel;

}

-(UILabel *) Goodslastlabel

{

if (!_goodslastlabel) {

_goodslastlabel = [[UILabel alloc]init];

_goodslastlabel.text = @ "Product name";

_goodslastlabel.backgroundcolor = [Uicolor Yellowcolor];

_goodslastlabel.textalignment = Nstextalignmentcenter;

_goodslastlabel.font = [Uifont systemfontofsize:12];

}

return _goodslastlabel;

}

-(UIButton *) Freebutton

{

if (!_freebutton)

{

_freebutton = [UIButton buttonwithtype:uibuttontypecustom];

[_freebutton settitle:@ "readily take" forstate:uicontrolstatenormal];

[_freebutton Settitlecolor:[uicolor Blackcolor] forstate:uicontrolstatenormal];

[_freebutton Setbackgroundcolor:[uicolor Redcolor];

_freebutton.layer.maskstobounds = YES;

_freebutton.layer.cornerradius = 5;

}

return _freebutton;

}

@end

which

Enjoywaterflowlayout is the same as my last article, you can go and watch

Then my collectionview is placed in a view, not put in the VC

#import <UIKit/UIKit.h>

@protocol zoneofenjoyviewdelegate <NSObject>

-(void) Freebtngotobuyview: (UIButton *) sender Withlistmodel: (Enjoylistmodel *) Listmodel;

@end

@interface Zoneofenjoyview:uiview

@property (nonatomic,assign) id<zoneofenjoyviewdelegate>delegate;

@property (Nonatomic,strong) Uicollectionview *collectionview;

/* Comment */

@property (Nonatomic,strong) Nsmutablearray *goodsmuarray;

@end

. m file implementations

#define KMAINSCREENWIDTH [[UIScreen Mainscreen] Applicationframe].size.width

#define Kmainscreenheight [[UIScreen Mainscreen] Applicationframe].size.height

#define KDEVICEWIDTH [UIScreen mainscreen].bounds.size.width//Interface width

#define Kdeviceheight [UIScreen mainscreen].bounds.size.height//interface height

#define Kstatusbarheight [[UIApplication sharedapplication] Statusbarframe].size.height

#define Kheight (kdeviceheight-kstatusbarheight-knavigationbarheight)//height

#define Ktabbarheight 49.0

#import "ZoneOfEnjoyView.h"

#import "EnjoyBannerView.h"

#import "EnjoyCollectionCellOfView.h"

#import "EnjoyWaterFlowLayout.h"

@interface Zoneofenjoyview () <uicollectionviewdelegate,uicollectionviewdatasource,waterflowlayoutdelegate, Enjoycollectioncellofviewdelegate>

{

}

@property (Nonatomic,strong) Enjoybannerview *bannerview;

/* Comment */

@property (Nonatomic,strong) Nsmutablearray *goodsmuarray;

@end

static NSString *const cellidentifier = @ "Enjoycollectioncellofviewcell";

@implementation Zoneofenjoyview

-(Instancetype) initWithFrame: (CGRect) frame

{

self = [super Initwithframe:frame];

if (self)

{

Enjoywaterflowlayout *layout = [[Enjoywaterflowlayout alloc]init];

Layout.delegate = self;

Self.collectionview = [[Uicollectionview alloc]initwithframe:cgrectmake (0, 0, Kdevicewidth, Kdeviceheight-10-ktabbar Height-44) Collectionviewlayout:layout];

Self.collectionView.backgroundColor = [Uicolor Whitecolor];

_collectionview.datasource = self;

_collectionview.delegate = self;

[Self addSubview:self.collectionView];

[Self.collectionview Registerclass:[enjoycollectioncellofview class] forcellwithreuseidentifier:cellidentifier];

if (!self.goodsmuarray)

//        {

Self.goodsmuarray = [Nsmutablearray array];

//        }

}

return self;

}

-(void) Setgoodsmuarray: (Nsmutablearray *) Goodsmuarray

{

_goodsmuarray = Goodsmuarray;

if (_goodsmuarray.count)

{

[Self.goodsmuarray Addobjectsfromarray:goodsmuarray];

[Self.collectionview Reloaddata];

}

Else

{

Return

}

}

#pragma mark--Uicollectionviewdatasource

#pragma mark-collection data Source proxy

-(Nsinteger) CollectionView: (Uicollectionview *) CollectionView numberofitemsinsection: (NSInteger) Section

{

if (Self.goodsMuArray.count)

{

return self.goodsMuArray.count;

}

Else

{

return 0;

}

}

-(Uicollectionviewcell *) CollectionView: (Uicollectionview *) CollectionView Cellforitematindexpath: (NSIndexPath *) Indexpath

{

Enjoylistmodel *model = [[Enjoylistmodel alloc]init];

Enjoycollectioncellofview *cell = (Enjoycollectioncellofview *) [CollectionView Dequeuereusablecellwithreuseidentifier:cellidentifier Forindexpath:indexpath];

Cell.freeButton.tag = Indexpath.row;

Cell.delegate = self;

if (Self.goodsMuArray.count)

{

model = Self.goodsmuarray[indexpath.row];

[Cell Updateenjoycollectioncellofviewmodel:model];

}

Else

{

}

return cell;

}

-(CGFloat) Waterflowlayout: (Enjoywaterflowlayout *) waterflowlayout Heightforrowatindexpath: (NSInteger) index Itemwidth: (cgfloat) Itemwidth

{

Return (Kdevicewidth)/2 + 75;

}

@end

Finally in the VC implementation

#import "ViewController.h"

#import "ZoneOfEnjoyView.h"

#import "MJREFRESH.H"

#define KDEVICEWIDTH [UIScreen mainscreen].bounds.size.width//Interface width

#define Kdeviceheight [UIScreen mainscreen].bounds.size.height//interface height

@interface Viewcontroller ()

/* Comment */

@property (Nonatomic,strong) Zoneofenjoyview *enjoyview;

/**

* Store fake data

*/

@property (Strong, nonatomic) Nsmutablearray *fakecolors;

@end

@implementation Viewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Self.enjoyview = [[Zoneofenjoyview alloc]initwithframe:cgrectmake (0, 0, Kdevicewidth, kDeviceHeight-45)];

[Self.view AddSubview:self.enjoyView];

if (!self.fakecolors) {

Self.fakecolors = [Nsmutablearray array];

}

Self.enjoyView.goodsMuArray = [Nsmutablearray array];

Additional setup after loading the view, typically from a nib.

}

-(void) Viewwillappear: (BOOL) animated

{

Nsarray *array [email protected][@ "1111", @ "2222", @ "1111"];

[Self.enjoyview Resetzoneofenjoyview:array withindex:1];

2. Integrated Refresh Control

[Self addheader];

[Self addfooter];

}

-(void) AddHeader

{

__unsafe_unretained typeof (self) VC = self;

__block typeof (self) weakself = self;

Add a drop-down refresh header control

Nsmutablearray *array = [Nsmutablearray array];

[WeakSelf.enjoyView.collectionView addheaderwithcallback:^{

Enter the refresh state and the block will be recalled.

Add 5 false data

for (int i = 0; i<5; i++)

{

[WeakSelf.enjoyView.goodsMuArray insertobject:@ "0000" atindex:0];

}

Simulates lazy loading of data, so it is only called after 2 seconds)

Dispatch_after (Dispatch_time (Dispatch_time_now, (int64_t) (2.0 * nsec_per_sec)), Dispatch_get_main_queue (), ^{

[Vc.enjoyView.collectionView Reloaddata];

End Refresh

[Vc.enjoyView.collectionView headerendrefreshing];

});

}];

#warning automatic Refresh (a drop-down refresh when you enter the program)

[Self.enjoyView.collectionView headerbeginrefreshing];

}

-(void) Addfooter

{

__unsafe_unretained typeof (self) VC = self;

__block typeof (self) weakself = self;

Add a pull-up refresh trailer control

[WeakSelf.enjoyView.collectionView addfooterwithcallback:^{

Enter the refresh state and the block will be recalled.

Add 5 false data

for (int i = 0; i<5; i++) {

[WeakSelf.enjoyView.goodsMuArray addobject:@ "1111"];

}

[Weakself.enjoyview Resetzoneofenjoyview:[nsarray arrayWithArray:vc.fakeColors] withindex:0];

Simulates lazy loading of data, so it is only called after 2 seconds)

Dispatch_after (Dispatch_time (Dispatch_time_now, (int64_t) (2.0 * nsec_per_sec)), Dispatch_get_main_queue (), ^{

[Vc.enjoyView.collectionView Reloaddata];

End Refresh

[Vc.enjoyView.collectionView footerendrefreshing];

});

}];

}

/**

Frees up memory in Dealloc in order to ensure internal non-disclosure

*/

-(void) dealloc

{

NSLog (@ "Mjcollectionviewcontroller--dealloc---");

}

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

Dispose of any resources the can be recreated.

}

iOS implementation drop-down refresh, pull-up load