IOS 九宮格演算法

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@interface ViewController ()@property (nonatomic,strong) NSArray *apps; //擷取.plist資料@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];          //九宮格的總列數    int totalColumns=5;        //1.1個格子的尺寸    CGFloat appW=50;    CGFloat appH=60;        //2.計算間隙 ＝（控制器view的寬度 -5*應用寬度）/應用寬度+1    CGFloat margin=(self.view.frame.size.width-totalColumns*appW)/(totalColumns+1);        //3.要的應用個數建立對應的格子        for (int index=0; index<self.apps.count; index++)    {        //3.1 建立1個格子        UIView *appView=[[UIView alloc]init];                //設定背景色        appView.backgroundColor=[UIColor redColor];                //3.2計算行號和列號        int row =index /totalColumns;        int col =index % totalColumns;                CGFloat appX =margin+ col*(appW + margin);        CGFloat appY =30+ row*(appH + margin);                appView.frame=CGRectMake(appX, appY, appW, appH);                //3.3添加格子到控制器的View        [self.view addSubview:appView];            }        }

 

IOS 九宮格演算法