#import "RootViewController.h"

//加入头文件

#import "UIImageView+WebCache.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

    if (self) {

        // Custom initialization

    }

    return self;

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.title=@"SDWebImage使用";

    //要显示图片的view

    UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(50, 100, 200, 200)];

    imageView.backgroundColor=[UIColor redColor];

    [self.view addSubview:imageView];

    //url为网上的图片地址

    NSString *url=@"http://f.dalang.gov.cn/uppic/2011-7-16/2011071610283352633.jpg";

    //当url不存在的时候，用本地的图片1.jpg来进行加载。

    [imageView setImageWithURL:[NSURL URLWithString:url] placeholderImage:[UIImage imageNamed:@"1.jpg"]];

}