30.小项目：喜马拉雅 版本1.0

------------- ViewController.m -------------

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIScrollView *scrView;

@property (nonatomic,strong) NSArray *arrs;

@end

@implementation ViewController

- (NSArray *)arrs

{

    if(_arrs == nil)

    {

        NSString *strPath = [[NSBundle mainBundle] pathForResource:@"arr" ofType:@"plist"];

        _arrs = [NSArray arrayWithContentsOfFile:strPath];

    }

    return _arrs;

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    CGFloat aW = 130;

    CGFloat aH = 130;

    int num = 2;

    CGFloat marginX = (self.view.frame.size.width - aW * num) / (num + 1);

    CGFloat marginY = 20;

    for (int index = 0; index < self.arrs.count; index++)

    {

        UIButton * apic = [[UIButton alloc] init];

        int col = index % num;

        CGFloat aX = marginX + (aW + marginX) * col;

        int row = index / num;

        CGFloat aY = 20 + marginY + (aH + marginY) * row;

        apic.frame = CGRectMake(aX, aY,aW,aH);

        NSDictionary *dic = self.arrs[index];

        [apic setBackgroundImage:[UIImage imageNamed:dic[@"pic"]] forState:UIControlStateNormal];

        [self.scrView addSubview:apic];

    }

    UIButton * lastBtn = [[UIButton alloc] init];

    lastBtn.frame = CGRectMake(20, 490, 280, 80);

    [lastBtn setBackgroundImage:[UIImage imageNamed:@"banner"] forState:UIControlStateNormal];

    [self.scrView addSubview:lastBtn];

    CGFloat height = CGRectGetMaxY(lastBtn.frame);

    self.scrView.contentSize = CGSizeMake(0, height);

    self.scrView.contentInset = UIEdgeInsetsMake(20, 0, 20, 0);

    self.scrView.contentOffset = CGPointMake(0, -20);

}

@end