iOS Video Music playback

iOS Development tips (video and music playback)1. iOS video playback code (add mediaplayer.framework and #import)-(void) Playmovie: (NSString *) filename{//Video File pathNSString *path = [[NSBundle mainbundle] pathforresource:filename ofType:@"mp4"]; //Video URLNsurl *url =[Nsurl Fileurlwithpath:path]; //Video Playback ObjectsMPMoviePlayerController *movie =[[MPMoviePlayerController alloc] initwithcontenturl:url]; Movie.controlstyle=Mpmoviecontrolstylefullscreen;    [Movie.view SetFrame:self.view.bounds]; Movie.initialplaybacktime= -1;    [Self.view AddSubview:movie.view]; //register a notification to end a play[[Nsnotificationcenter defaultcenter] addobserver:self selector: @selector (mymoviefinishedcallback:) name:mpm OvieplayerplaybackdidfinishnotificationObject: movie];    [Movie play]; }        #pragmaMark-------------------the end of the video playback delegate---------------------(void) Mymoviefinishedcallback: (nsnotification*) Notify {//Video Playback Objectsmpmovieplayercontroller* Themovie = [notifyObject]; //Destroying playback notifications[[Nsnotificationcenter defaultcenter] removeobserver:self name:mpmovieplayerplaybackdidfinishnotification 
    Object: Themovie];    [Themovie.view Removefromsuperview]; //releasing a video object[Themovie release]; }2. Play background music, use the class to play the "background music playback supports the MP3 format to play music in a way that plays long music. Import Frames #import<AVFoundation/AVFoundation.h>; #import<UIKit/UIKit.h>{Avaudioplayer*Mybackmusic;}//the above steps are important and must be instantiated in the H file. Do not know why, directly in the M file instantiation, will not broadcast sound. The bottom is in the M file-（void) viewdidload{NSString*musicfilepath = [[NSBundle mainbundle] Pathforresource:@"Changan"OfType:@"mp3"];//Create a music file pathNsurl*musicurl =[[Nsurl alloc] initfileurlwithpath:musicfilepath]; Avaudioplayer*theplayer =[[Avaudioplayer alloc] Initwithcontentsofurl:musicurl Error:nil]; //Create playerMybackmusic= Theplayer;//assigning to a class variable of its own definition[Musicurl release];  [Theplayer release]; [Mybackmusic Preparetoplay]; [Mybackmusic SetVolume:1];//Set Volume sizeMybackmusic.numberofloops= -1;//set the number of music plays-1 to keep looping, set the Numberofloops property of the audio player to negative so that it plays an infinite loopNSLog (@"%f seconds played so far", audioplayer.currenttime);//View the initial time of playback, that is, how many seconds to start playingAudioplayer.currenttime=Ten;//Jump to the ten second Mark//set the time for playback to start[Mybackmusic play];//Play[Mybackmusic pause];  [Mybackmusic stop];} 3. iOS plays a sound (add audiotoolbox.framework and #import) "" is mainly used to play a sound, such as click on the sound, beat the second, in the sound method of playing. M method Add #import: #import接下来, The code to play the sound is as follows: NSString*path = [[NSBundle mainbundle] Pathforresource:@"Soundfilename"OfType:@"wav"]; Systemsoundid Soundid; Audioservicescreatesystemsoundid (__bridge cfurlref) [Nsurl Fileurlwithpath:path],&Soundid); Audioservicesplaysystemsound (Soundid); 1, get the global delegate object so that we can invoke the methods and variables in this object: [(Myappdelegate*) [[UIApplication sharedapplication]Delegate] mymethodormyvariable];2, obtaining the main bundle:nsbundle of the program*bundle =[NSBundle Mainbundle]; Bundles can be understood as a folder in which the content follows a specific framework. One of the main uses of the main bundle is the use of resource files, slices, sounds, plst files, etc. in the program. Nsurl*plisturl = [Bundle Urlforresource:@"Plistfile"Withextension:@"plist"]; The above code gets the path to the Plistfile.plist file. 3, play sound in the program: first add Audiotoolbox to the program: second, add #import: In the. m method that has the play sound method, #import接下来, the code that plays the sound is as follows: NSString*path = [[NSBundle mainbundle] Pathforresource:@"Soundfilename"OfType:@"wav"]; Systemsoundid Soundid; Audioservicescreatesystemsoundid (__bridge cfurlref) [Nsurl Fileurlwithpath:path],&Soundid); Audioservicesplaysystemsound (soundid);4, set and get property values in the class: [Self setValue: Variable value forkey: variable name]; [Self valueforkey: variable name];5to allow a method to execute after a certain period of time: [Self Performselector: @selector (method name) Withobject:nil Afterdelay: Delay time (s)];6, obtain the device version number:floatVersion =[[[ Uidevice Currentdevice] systemversion] floatvalue];7, capture program shutdown, or go to background event: UIApplication*app =[UIApplication sharedapplication]; [[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (applicationwillresignactive:) Name: UiapplicationwillresignactivenotificationObject: app];applicationwillresignactive: Add the desired action in this method8, view the fonts supported by the device: for(NSString *familyinch[Uifont Familynames]) {NSLog (@"%@", family); for(NSString *fontinch[Uifont fontnamesforfamilyname:family]) {NSLog (@"\t%@", font);}}9, add a click event for Uiimageview: imageview.userinteractionenabled=YES; UITapGestureRecognizer*singletap =[[UITapGestureRecognizer alloc] initwithtarget:self action: @selector (yourhandlingcode:)];[ ImageView Addgesturerecognizer:singletap];Ten, add multi-language support: such as image picker components, the text of the button above it changes with the device language environment, but first in the project to add language: One, enabling the program to support devices such as itunes, such as using a PC-side tool to drag and drop files to documents in the program.  A, page transition effect settings: Controller.modaltransitionstyle=uimodaltransitionstylecoververtical; [Self Presentmodalviewcontroller:controller animated:yes]; Available Effects: Uimodaltransitionstylecoververticaluimodaltransitionstylefliphorizontaluimodaltransitionstylecrossdissolveuimodal Transitionstylepartialcurl page before recovery: [Self Dismissmodalviewcontrolleranimated:yes];via devdiv

iOS Video Music playback