IOS UI Basics Nine Gongge algorithm

Case Analysis:

Analysis:

Code Case implementation:

//

Viewcontroller.m

01-Nine Lattice algorithm

//

Created by Flylee on 14-9-12.

Copyright (c) 2014 Flylee. CN. All rights reserved.

//

#import "ViewController.h"

@interface Viewcontroller ()

/*

Data container

*/

@property (Nonatomic,strong) Nsarray *apps;

@end

@implementation Viewcontroller

Lazy Loading

-(Nsarray *) apps

{

if (_apps = = nil) {

1. Get the full path to the plist file

NSString *path = [[NSBundle mainbundle] pathforresource:@ "app.plist" oftype:nil];

2. Loading an array

_apps = [Nsarray Arraywithcontentsoffile:path];

}

return _apps;

}

-(void) viewdidload

{

[Super Viewdidload];

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

1. Number of columns in each row

int totalcol = 3;

2. Constants for the dimensions and y values of each lattice

CGFloat APPW = 85;

CGFloat APPH = 90;

CGFloat starty = 30; Set the initial position of Y, battery bar 20 so the initial position setting 30

CGFloat marginy = 15; Set the initial gap space for Y

3. Clearance = (width of the Controller view-3 * grid)/4;

CGFloat Marginx = (Self.view.frame.size.width-totalcol * appw)/(Totalcol + 1);

int count = Self.apps.count;

4. Based on the number of application management, create a grid

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

4.1 CREATE View

UIView *appview = [[UIView alloc] init];

Appview.backgroundcolor = [Uicolor Redcolor];

4.2 Calculating line numbers and column numbers

i = 0, 1, 2/3 = 0 The initial is 0 lines start 0, 1, 2, 3 ....

i = 3, 4, 5/3 = 1

int row = I/totalcol;

i = 0, 3, 6 3 = 0 The initial is 0 columns start 0, 1, 2, 3 ....

i = 1, 4, 7%3 = 1

int col = i% Totalcol;

4.3 Calculating x and Y

CGFloat AppX = Marginx + (APPW + marginx) * COL;

CGFloat appy = Starty + (APPH + marginy) * ROW;

Appview.frame = CGRectMake (Appx,appy, APPW,APPH);

4.4 Adding a grid to the view of the controller

[Self.view Addsubview:appview];

}

}

-(void) didreceivememorywarning

{

[Super didreceivememorywarning];

Dispose of any resources the can be recreated.

}

@end

IOS UI Basics Nine Gongge algorithm