IOS request download songs for pictures via web

1. Import Agent <nsurlconnectiondatadelegate>

1 @interfaceViewcontroller () <NSURLConnectionDataDelegate>2 {3     Long LongAlllength;//Download Total length4     Long LongCurrlenth;//download length for current period5 }6 //storage of downloaded MP3 data streams7@property (nonatomic,strong) Nsmutabledata *msicdate;8 //Download Progress Display9@property (nonatomic,strong) Uiprogressview *msicprogress;Ten //Download Button One@property (nonatomic,strong) UIButton *But ; A //Music Playback -@property (Nonatomic,strong) Avaudioplayer *player;

1 //Add download image address2NSString *path=@"http://pic1.nipic.com/2008-10-27/200810278105878_2.jpg";3     4     //Call the download picture method5 [self addtheimg:path];6     7     //Progress bar Settings8Self.msicprogress =[[uiprogressview Alloc]initwithframe:cgrectmake ( -, +, the,Ten)];9self.msicprogress.progress=0;Ten     //set the download progress color OneSelf.msicprogress.progresstintcolor=[uicolor colorwithred:0.007Green0.868Blue0.000Alpha1.000]; A     //progress bar Background color -Self.msicprogress.tracktintcolor=[Uicolor Graycolor]; -      the     //download button click to download -self.but=[UIButton Buttonwithtype:uibuttontypecustom]; -_but.frame=cgrectmake ( $, -, +, -); - [_but settitlecolor:[uicolor whitecolor]forstate:uicontrolstatenormal]; +[_but Settitle:@"Download"Forstate:uicontrolstatenormal]; -_but.backgroundcolor=[Uicolor Orangecolor]; + [_but addtarget:self Action: @selector (Plarmusic:) forcontrolevents:uicontroleventtouchupinside]; A      at [Self.view addsubview:_msicprogress]; -[Self.view addsubview:_but];

Implementation of the method

1 //button click Time corresponding method2-(void) Plarmusic: (UIButton *) Sender3 {4     //total length of the song download5Alllength=0;6     //The amount currently acquired7Currlenth =0;8Self.msicdate =[[Nsmutabledata alloc]init];9     //set the address of the song downloadTenNSString *path=@"http://yinyueshiting.baidu.com/data2/music/124345627/124104509190800128.mp3?xcode= CB12E87F8333E5370D9B8F0C677C76D2"; OneNsurl *url=[Nsurl Urlwithstring:path]; A     //Mode 1 Network request -Nsurlrequest *requst=[Nsurlrequest Requestwithurl:url]; -     //Mode 2 the     //nsurlrequest *resq=[[nsurlrequest Alloc]initwithurl:url cachepolicy:nsurlrequestuseprotocolcachepolicy timeoutinterval:10.0]; -      -     //Create a connection server with a proxy request -[Nsurlconnection Connectionwithrequest:requstDelegate: self]; +}

1 //Implementing the Network Request Proxy method2-(void) Connection: (Nsurlconnection *) connection didreceiveresponse: (Nsurlresponse *) Response3 {4     //get the length of the MP3 you want to download, and receive a response to know that it is not finished downloading5     //This proxy method executes only once to get the total amount of data6Alllength =[Response expectedcontentlength];7 }8 9 //gets the amount of data that is downloaded each time this method executes multiple timesTen-(void) Connection: (Nsurlconnection *) connection didreceivedata: (NSData *) Data One { A     //put data for each download in the data area - [Self.msicdate Appenddata:data]; -     //append the length of the acquired data to the current length theCurrlenth + =data.length; -     //Update progress bar -Self.msicprogress.progress= (float) currlenth/alllength; - } +  - //download End call, play music +-(void) Connectiondidfinishloading: (Nsurlconnection *) Connection A { atNserror *error=Nil; -     //after the download is complete, initialize the player and then play the song -Self.player = [[Avaudioplayer alloc]initwithdata:self.msicdate error:&ERROR]; - [Self.player play]; - } -  in //Request Error Call --(void) Connection: (Nsurlconnection *) connection didfailwitherror: (Nserror *) Error to { +     if(Error) { -NSLog (@"error = =%@", error); the     } *}

1 //methods for calling pictures2-(void) Addtheimg: (NSString *) path3 {4     //1. Create a URL from a string5NSString *imgstr=path;6Nsurl *imgurl=[Nsurl Urlwithstring:imgstr];7     8     //2. Create a network request9Nsurlrequest *requst=[nsurlrequest Requestwithurl:imgurl Cachepolicy:nsurlrequestuseprotocolcachepolicy timeOutInterval:10.0];Ten      OneNserror *error=Nil; A     //3. Linked Servers -NSData *imgdate = [nsurlconnection sendsynchronousrequest:requst returningresponse:nil error:&ERROR]; -     if(Error) the     { -         //if error, print error -NSLog (@"%@", error); -}Else +     { -         //If a picture is found, create a picture view to receive the picture +Uiimageview *img=[[uiimageview Alloc]initwithframe:cgrectmake (5, -, -, -)]; AImg.image=[UIImage imagewithdata:imgdate]; at         //display a picture in a view - [Self.view addsubview:img]; -     } -  -}

IOS request download songs for pictures via web