One of the Viewcontroller slimming (reproduced)

In an iOS project, Viewcontroller is usually the largest file and contains many unnecessary code, with the lowest reuse rate.

We can try to give viewcontroller weight, make him look not so bloated.

Today's talk is about, Uitableviewdatasource.

UITableView may be the most commonly used in writing projects in the component, use it to implement its proxy protocol and data source method, each time is a thing method controller, look uncomfortable, we can give him a thin body. For example, to do so.

Because DataSource is basically around the array to do something, more specifically around the Viewcontroller data array to do something, we can pull it out, separate in a class, we use a block to set the cell, You can also use delegate to do this, which is entirely up to you.

Below the code, for a chestnut ~

1 //2 //ArrayDataSource.h3 //lrdbasicframework4 //5 //Created by the dancer on the keyboard on 5/21/16.6 //copyright©2016 The dancers on the keyboard. All rights reserved.7 //encapsulates a DataSource class that can make controller more lightweight8  9 #import<Foundation/Foundation.h>Ten   Onetypedefvoid(^tableviewcellconfigureblock) (IDCellIDitem); A   - @interfaceArraydatasource:nsobject <UITableViewDataSource> -   the- (ID) Initwithitems: (Nsarray *) Items -Cellidentifier: (NSString *) Identifier - Configureblock: (tableviewcellconfigureblock) Configureblock; -   +- (ID) Itematindexpath: (Nsindexpath *) Indexpath; -   + @end

1 //2 //ARRAYDATASOURCE.M3 //lrdbasicframework4 //5 //Created by the dancer on the keyboard on 5/21/16.6 //copyright©2016 The dancers on the keyboard. All rights reserved.7 //8  9 #import "ArrayDataSource.h"Ten   One @interfaceArraydatasource () A   -@property (nonatomic, strong) Nsarray *items; -@property (nonatomic, copy) NSString *identifier; the @property (nonatomic, copy) Tableviewcellconfigureblock Configureblock; -   - @end -   + @implementationArraydatasource -   +-(instancetype) init { A     returnNil; at } -   -- (ID) Initwithitems: (Nsarray *) Items Cellidentifier: (NSString *) identifier Configureblock: (Tableviewcellconfigureblock) Configureblock { -Self =[Super init]; -     if(self) { -Self.items =items; inSelf.identifier =identifier; -Self.configureblock =Configureblock; to     } +     returnSelf ; - } the   *- (ID) Itematindexpath: (Nsindexpath *) Indexpath { $     returnself.items[(Nsuinteger) indexpath.row];Panax Notoginseng } -   the #pragmaMark-datasource +-(Nsinteger) TableView: (UITableView *) TableView numberofrowsinsection: (nsinteger) Section { A     returnSelf.items.count; the } +   --(UITableViewCell *) TableView: (UITableView *) TableView Cellforrowatindexpath: (Nsindexpath *) Indexpath { $UITableViewCell *cell =[TableView dequeueReusableCellWithIdentifier:self.identifier Forindexpath:indexpath]; $     IDitem =[self itematindexpath:indexpath]; - Self.configureblock (cell, item); -     returncell; the } - @end

And then we can use it in Viewcontroller.

1 //2 //DEMOROOTCONTROLLER.M3 //lrdbasicframework4 //5 //Created by the dancer on the keyboard on 5/21/16.6 //copyright©2016 The dancers on the keyboard. All rights reserved.7 //8  9 #import "DemoRootController.h"Ten #import "ArrayDataSource.h" One #import "DemoFrameController.h" A #import "DemoFouctionController.h" - #import "DemoDIYController.h" - #import "DemoCommUtils.h" the   - StaticNSString *identifier =@"Menu_cell"; -   - @interfaceDemorootcontroller () +   -@property (nonatomic, strong) Arraydatasource *Arraydatasource; +   A @end at   - @implementationDemorootcontroller -   -- (void) Viewdidload { - [Super Viewdidload]; -Self.title =@"Demo"; in     //Initialize - [self initui]; to } +   -- (void) Initui { theNsarray *items = @[@"Custom Controls",@"Functional Expansion",@"Common tool Classes",@"Basic Framework"]; *Self.arraydatasource = [[Arraydatasource alloc] Initwithitems:items cellidentifier:identifier configureBlock:^ ( UITableViewCell *cell, NSString *Item) { $Cell.accessorytype =Uitableviewcellaccessorydisclosureindicator;Panax NotoginsengCell.textLabel.text =item; -     }]; theSelf.tableView.dataSource =Self.arraydatasource; +[Self.tableview Registerclass:[uitableviewcellclass] forcellreuseidentifier:identifier]; A } the   + #pragmaMark-delegate -- (void) TableView: (UITableView *) TableView Didselectrowatindexpath: (Nsindexpath *) Indexpath { $     if(Indexpath.row = =0) { $         //Custom Controls -Demodiycontroller *VC =[[Demodiycontroller alloc] initwithstyle:uitableviewstylegrouped]; -Vc.title =[Self.arraydatasource Itematindexpath:indexpath]; the [Self.navigationcontroller PUSHVIEWCONTROLLER:VC animated:yes]; -}Else if(Indexpath.row = =1) {Wuyi         //Functional Expansion theDemofouctioncontroller *VC =[[Demofouctioncontroller alloc] initwithstyle:uitableviewstylegrouped]; -Vc.title =[Self.arraydatasource Itematindexpath:indexpath]; Wu [Self.navigationcontroller PUSHVIEWCONTROLLER:VC animated:yes]; -}Else if(Indexpath.row = =2) { About         //Common tool Classes $Democommutils *VC =[[Democommutils alloc] initwithstyle:uitableviewstylegrouped]; -Vc.title =[Self.arraydatasource Itematindexpath:indexpath]; - [Self.navigationcontroller PUSHVIEWCONTROLLER:VC animated:yes]; -}Else if(Indexpath.row = =3) { A         //Basic Framework +Demoframecontroller *VC =[[Demoframecontroller alloc] initwithstyle:uitableviewstylegrouped]; theVc.title =[Self.arraydatasource Itematindexpath:indexpath]; - [Self.navigationcontroller PUSHVIEWCONTROLLER:VC animated:yes]; $     } the [TableView Deselectrowatindexpath:indexpath animated:yes]; the } the   the @end

Does it look like Viewcontroller has lost a lot of weight??

Transferred from: http://www.lrdup.net/archives/1046

One of the Viewcontroller slimming (reproduced)