iOS网络加载启动图

//这一步是获取LaunchScreen.storyboard里的UIViewController,UIViewController

的identifer是LaunchScreen

   
UIViewController
*viewController = [[UIStoryboard

storyboardWithName:@"LaunchScreen"

bundle:[NSBundle

mainBundle]]

instantiateViewControllerWithIdentifier:@"LaunchScreen"];

   
UIView
*launchView = viewController.view;

   
UIImageView  * Imageview= [[UIImageView 

alloc]initWithFrame:[UIScreen

mainScreen].bounds];

    [launchView
addSubview:Imageview];

    [self.view

addSubview:launchView];

   

   
//这一步是获取上次网络请求下来的图片，如果存在就展示该图片，如果不存在就展示本地保存的名为test的图片

   
NSMutableData
* data = [[NSUserDefaults

standardUserDefaults]objectForKey:@"imageu"];

   
if (data.length>0)
{

         Imageview.image
= [UIImage

imageWithData:data];

    }else{

   

     Imageview.image
= [UIImage

imageNamed:@"Test"];

    }

  

   

 //下面这段代码，是调用AFN下载文件的方法，异步

   
NSURLSessionConfiguration
*configuration = [NSURLSessionConfiguration

defaultSessionConfiguration];

   
AFURLSessionManager
*manager = [[AFURLSessionManager

alloc]

initWithSessionConfiguration:configuration];

   
NSURL
*URL = [NSURL

URLWithString:@"http://s16.sinaimg.cn/large/005vePOgzy70Rd3a9pJdf&690"];

   
NSURLRequest
*request = [NSURLRequest

requestWithURL:URL];

   
NSURLSessionDownloadTask
*downloadTask = [manager
downloadTaskWithRequest:request

progress:nil

destination:^NSURL
*(NSURL
*targetPath,

NSURLResponse
*response) {

       
NSURL
*documentsDirectoryURL = [[NSFileManager

defaultManager]

URLForDirectory:NSDocumentDirectory

inDomain:NSUserDomainMask

appropriateForURL:nil

create:NO

error:nil];

       
return
[documentsDirectoryURL
URLByAppendingPathComponent:[response

suggestedFilename]];

    }
completionHandler:^(NSURLResponse
*response,

NSURL
*filePath,
NSError
*error) {

       
NSLog(@"File downloaded to: %@",
filePath);

       

       
NSData
* image = [NSData

dataWithContentsOfURL:filePath];

        [[NSUserDefaults

standardUserDefaults]setObject:image

forKey:@"imageu"];

       

       

    }];

    [downloadTask
resume];

   

   

   
//这段代码，可以实现第二张图片有3D的动画效果，动画结束后，进行同步的网络请求，请求的是广告页图片

    [UIView

animateWithDuration:3.0f

delay:0.0f

options:UIViewAnimationOptionBeginFromCurrentState

animations:^{

       

       
//launchView.alpha = 0.0f;

        launchView.layer.transform
=
CATransform3DScale(CATransform3DIdentity,

1.5f,

1.5f,

1.0f);

    }
completion:^(BOOL
finished) {

    

    

               
NSString
* ad_imgUrl  =
@"http://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%9B%BE%E7%89%87&pn=0&spn=0&di=125546894880&pi=&rn=1&tn=baiduimagedetail&ie=utf-8&oe=utf-8&cl=2&lm=-1&cs=1003704465%2C1400426357&os=4246966059%2C4277404619&simid=4210997991%2C798394471&adpicid=0&ln=30&fr=ala&fm=&sme=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fpic25.nipic.com%2F20121112%2F5955207_224247025000_2.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bgtrtv_z%26e3Bv54AzdH3Ffi5oAzdH3FnAzdH3F0nAzdH3F0al8l0mhdj9v1c9n_z%26e3Bip4s&gsm=0";

               
AppDelegate
*appDelegate = (AppDelegate
*)[[UIApplication

sharedApplication]

delegate];

                [BBLaunchAdMonitor

showAdAtPath:ad_imgUrl

                                        
onView:appDelegate.window.rootViewController.view

                                  
timeInterval:5

                              
detailParameters:@{@"carId":@(0001),

@"name":@"0007"}];

                   [launchView
removeFromSuperview];

               

       

    }];