九宫格---可滑动，可调整每行有几列，共有几行，边距可自适应

九宫格---可滑动，可调整每行有几列，共有几行，边距可自适应

效果图如下所示：

#import "ViewController.h"

#define spaceLR (375-numRow*70)/(numRow+1)   
//左右两边的边距

#define spaceMD (375-numRow*70)/(numRow+1)   
//中间空白距

@interface
ViewController () <UIScrollViewDelegate>

@property (nonatomic,
strong) UIScrollView * scroll;

@end

@implementation ViewController

- (void)viewDidLoad {

[super
viewDidLoad];

#pragma mark - 静态视图（不可滑动）

int numRow=3;   //此时显示为3列，可以自己调整列数

int numCol=50;  //此时显示为50行，可以自己调整行数，不能全部显示，可滑动查看

//添加scroll

_scroll = [[UIScrollView
alloc] initWithFrame:self.view.bounds];

_scroll.contentSize =
CGSizeMake(375,numCol*120);

_scroll.pagingEnabled =
YES;

_scroll.showsHorizontalScrollIndicator =
NO;

_scroll.showsVerticalScrollIndicator =
NO;

_scroll.bounces =
NO;

_scroll.delegate =
self;

for (int j=0; j<numCol; j++)

{

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

{

UIView * view=[[UIView
alloc]initWithFrame:CGRectMake(spaceLR+i*70+i*spaceMD,
20+j*120,
70, 120)];

UIImageView * imageView=[[UIImageView
alloc]initWithFrame:CGRectMake(0,
0, 70,
70)];

imageView.image=[UIImage
imageNamed:[NSString
stringWithFormat:@"%d",arc4random_uniform(20)+256]];

[view
addSubview: imageView];

UILabel * label=[[UILabel
alloc]initWithFrame:CGRectMake(0,
75, 70,
20)];

label.text=@"下载";

label.textAlignment=NSTextAlignmentCenter;

label.font=[UIFont
fontWithName:nil
size:14];

[view
addSubview:label];

[_scroll
addSubview:view];

}

}

[self.view
addSubview:_scroll];

}

@end