Manual Layout Sub-view of IOS development _ios

manually layout the child view;
Let's look at the effect chart below, the effect we are going to achieve today:

Here we default to start with storyboard:
First we're going to create a parent view on the white screen Superview (blue background), create four smaller views in the parent view (orange background)
Look at the code below,
Inside the SuperView.h file:

#import <UIKit/UIKit.h> @interface superview:uiview{uiview * _VIEW01;
 UIView * _VIEW02;
 UIView * _VIEW03;

UIView * _VIEW04;

}//Declare CREATE VIEW function-(void) createsubviews; @end in the superview.m file: #import "SuperView.h" @interface Superview () @end @implementation Superview-(void) creates
 ubviews{//upper left corner view _view01 = [[UIView alloc] init];

 _view01.frame=cgrectmake (0, 0, 40, 40);
 upper right corner view _view02 = [[UIView alloc] init];

 _view02.frame=cgrectmake (self.bounds.size.width-40, 0, 40, 40);
 Lower right corner view _view03 = [[UIView alloc] init];

 _view03.frame=cgrectmake (self.bounds.size.width-40, self.bounds.size.height-40, 40, 40);
 Lower left corner View _view04 = [[UIView alloc] init];

 _view04.frame=cgrectmake (0, self.bounds.size.height-40, 40, 40);
 _view01.backgroundcolor=[uicolor Orangecolor];
 _view02.backgroundcolor=[uicolor Orangecolor];
 _view03.backgroundcolor=[uicolor Orangecolor];

 _view04.backgroundcolor=[uicolor Orangecolor];
 [Self addsubview:_view01];
 [Self addsubview:_view02];[Self addsubview:_view03];

[Self addsubview:_view04];
 ////Adjust the position of the child view manually by calling this function//when a redistribution is required//(void) layoutsubviews{[UIView Beginanimations:nil Context:nil];

 [UIView Setanimationduration:1];
 _view01.frame=cgrectmake (0, 0, 40, 40);
 _view02.frame=cgrectmake (self.bounds.size.width-40, 0, 40, 40);
 _view03.frame=cgrectmake (self.bounds.size.width-40, self.bounds.size.height-40, 40, 40);

 _view04.frame=cgrectmake (0, self.bounds.size.height-40, 40, 40);

[UIView commitanimations];
 } @end

Inside the viewcontroller.m file:

#import "ViewController.h" #import "SuperView.h" @interface Viewcontroller () @end @implementation Viewcontroller-(
 void) Viewdidload {[Super viewdidload];

 Do no additional setup after loading the view, typically from a nib.
 Create a parent view Superview * Sview = [[Superview alloc]init];

 Sview.frame = CGRectMake (20, 20, 180, 280);

 The parent view calls the function to create four trivial views [Sview createsubviews];
 Sview.backgroundcolor = [Uicolor Bluecolor];

 [Self.view Addsubview:sview];
 UIButton * Btn01 = [UIButton buttonwithtype:uibuttontyperoundedrect];
 Btn01.frame = CGRectMake (240, 480, 80, 40);
 [Btn01 settitle:@ "enlarge" forstate:uicontrolstatenormal];
 [Btn01 addtarget:self Action: @selector (Presslarge) forcontrolevents:uicontroleventtouchupinside];

 [Self.view Addsubview:btn01];
 UIButton * btn02 = [UIButton buttonwithtype:uibuttontyperoundedrect];
 Btn02.frame = CGRectMake (240, 520, 80, 40);
 [Btn02 settitle:@ "shrink" forstate:uicontrolstatenormal]; [Btn02 addtarget:self Action: @selector (Presssmall) ForcontrolevEnts:uicontroleventtouchupinside];

 [Self.view ADDSUBVIEW:BTN02];


Sview.tag = 101;
 }//Enlarge parent View-(void) presslarge{Superview * Sview = (superview*) [Self.view viewwithtag:101];
 [UIView Beginanimations:nil Context:nil];
 [UIView Setanimationduration:1];
 Sview.frame=cgrectmake (20, 20, 280, 400);

[UIView commitanimations];
 }//Reduce parent View-(void) presssmall{Superview * Sview = (superview*) [Self.view viewwithtag:101];
 [UIView Beginanimations:nil Context:nil];
 [UIView Setanimationduration:1];
 Sview.frame=cgrectmake (20, 20, 180, 280);
[UIView commitanimations];
 }-(void) didreceivememorywarning {[Super didreceivememorywarning];
Dispose of any of the can is recreated.
 } @end

  above code writing finished, reached the above view effect, I hope to help you learn, but also hope that we support the cloud-dwelling community.