【代码笔记】看图听故事

一，效果图。

二，工程图。

三，代码。

RootViewController.h

#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>

@interface RootViewController : UIViewController <AVAudioPlayerDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate> { UIImageView * backImageView; AVAudioPlayer *_audioPlayer; NSMutableArray *musicArray; NSMutableArray *titleArray; int songIndex; UIButton * leftButton; UIButton * rightButton; UILabel *titleLabel; UISlider *Slider; UISlider *volumeSlider; NSTimer * processTimer; NSTimer * timer1; } @end

 

RootViewController.m

#import "RootViewController.h"

@interface RootViewController () @end

@implementation RootViewController - (void)viewDidLoad { [super viewDidLoad]; self.title = @"故事"; //初始化数据
 [self initData]; //初始化背景图
 [self initBackgroundView]; } #pragma -mark -functions
//初始化数据
-(void)initData { musicArray=[[NSMutableArray alloc]initWithObjects:@"7",@"11",@"9",@"17",@"5",@"6",@"1",@"8",@"15",@"10",@"2",@"12",@"13",@"14",@"4",@"16",@"3",@"18", nil]; titleArray=[[NSMutableArray alloc]initWithObjects:@"三头公牛和狮子",@"小红帽",@"天女散花",@"朋友再见",@"女娲造人",@"天神的哑水",@"小青蛙听故事",@"淘淘的愿望",@"讲礼貌",@"丑小鸭",@"老鼠,小鸟和香肠",@"两头驴子",@"驴子和主人",@"四个朋友",@"奖品",@"没法通过",@"五颗豌豆",@"彼得*潘", nil]; } //初始化背景图
-(void)initBackgroundView { self.navigationController.navigationBar.tintColor =[UIColor orangeColor]; self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:69.0/255 green:161.0/255 blue:241.0/255 alpha:1]; //背景
    backImageView= [[UIImageView alloc] initWithFrame: CGRectMake(0, 0, 320, 460)]; backImageView.image= [UIImage imageNamed:[NSString stringWithFormat:@"%@.jpg",[musicArray objectAtIndex:songIndex]]]; [self.view addSubview:backImageView]; //播放
    UIButton* button= [UIButton buttonWithType:UIButtonTypeCustom]; button.frame=CGRectMake(130, 260, 60, 50); button.tag=100; [button addTarget:self action:@selector(play:) forControlEvents:UIControlEventTouchUpInside]; [button setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal]; [self.view addSubview:button]; //上一首
    leftButton= [UIButton buttonWithType:UIButtonTypeCustom]; leftButton.frame=CGRectMake(50, 260, 60, 50); [leftButton addTarget:self action:@selector(prier) forControlEvents:UIControlEventTouchUpInside]; [leftButton setImage:[UIImage imageNamed:@"left.png"] forState:UIControlStateNormal]; [self.view addSubview:leftButton]; //下一首
    rightButton= [UIButton buttonWithType:UIButtonTypeCustom]; rightButton.frame=CGRectMake(210, 260, 60, 50); [rightButton addTarget:self action:@selector(next) forControlEvents:UIControlEventTouchUpInside]; [rightButton setImage:[UIImage imageNamed:@"right.png"] forState:UIControlStateNormal]; [self.view addSubview:rightButton]; //音量按钮
    UIButton *volumebutton= [UIButton buttonWithType:UIButtonTypeCustom]; volumebutton.frame=CGRectMake(10, 330, 40, 40); [volumebutton setImage:[UIImage imageNamed:@"labalan.png"] forState:UIControlStateNormal]; [volumebutton addTarget:self action:@selector(showVolume) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:volumebutton]; //背景
    UIButton *backButton= [UIButton buttonWithType:UIButtonTypeCustom]; backButton.frame=CGRectMake(270, 330, 40, 40); [backButton setImage:[UIImage imageNamed:@"apple.png"] forState:UIControlStateNormal]; [backButton addTarget:self action:@selector(setBackground) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:backButton]; //音乐logo图片
    UIImageView* musicImageView= [[UIImageView alloc] initWithImage: [UIImage imageNamed:@"musicLogo.png"]]; musicImageView.frame= CGRectMake(80, 40, 160, 140); [self.view addSubview:musicImageView]; //标题
    titleLabel= [[UILabel alloc] initWithFrame:CGRectMake(0, 195, 320, 30)]; titleLabel.font= [UIFont systemFontOfSize:25]; titleLabel.textAlignment= NSTextAlignmentCenter; titleLabel.textColor= [UIColor blueColor]; titleLabel.numberOfLines=0; titleLabel.backgroundColor= [UIColor clearColor]; titleLabel.text= [titleArray objectAtIndex:0]; [self.view addSubview:titleLabel]; //进度控制
    Slider= [[UISlider alloc] initWithFrame:CGRectMake(50, 230, 220, 5)]; Slider.maximumValue=100; Slider.minimumValue=0; Slider.value=0; Slider.continuous=NO; [Slider addTarget:self action:@selector(processSet:) forControlEvents:UIControlEventValueChanged]; [Slider addTarget:self action:@selector(processTimerStop) forControlEvents:UIControlEventTouchDown]; [self.view addSubview:Slider]; //音量控制
    volumeSlider= [[UISlider alloc] initWithFrame:CGRectMake(-85, 280, 220, 5)]; volumeSlider.maximumValue=1; volumeSlider.minimumValue=0; volumeSlider.value= 0.5; volumeSlider.hidden=YES; [volumeSlider addTarget:self action:@selector(volumeSet:) forControlEvents:UIControlEventValueChanged]; volumeSlider.transform= CGAffineTransformMakeRotation(-90* M_PI/180); [self.view addSubview:volumeSlider]; processTimer=[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(process) userInfo:nil repeats:YES]; [self loadMusic:[musicArray objectAtIndex:0] type:@"mp3"]; UILongPressGestureRecognizer* rightLongPress= [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(rightLongPress:)]; [rightButton addGestureRecognizer:rightLongPress]; UILongPressGestureRecognizer* leftLongPress= [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(leftLongPress:)]; [leftButton addGestureRecognizer:leftLongPress]; } //进度控制
-(void)processSet:(UISlider*)slider { processTimer=[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(process) userInfo:nil repeats:YES]; _audioPlayer.currentTime=slider.value/100*_audioPlayer.duration; if(_audioPlayer.playing==YES) [_audioPlayer playAtTime:_audioPlayer.currentTime]; } -(void)processTimerStop { [processTimer invalidate]; } //背景
-(void)setBackground { UIImagePickerController* picker= [[UIImagePickerController alloc] init]; picker.sourceType= UIImagePickerControllerSourceTypeSavedPhotosAlbum; picker.delegate=self; [self presentViewController:picker animated:NO completion:nil]; } #pragma -mark -doClickActions
//右侧按钮手势
-(void)rightLongPress:(UILongPressGestureRecognizer*)longPress { if (longPress.state != UIGestureRecognizerStateBegan) return; if(_audioPlayer.playing) { if(_audioPlayer.currentTime>_audioPlayer.duration-5) _audioPlayer.currentTime=_audioPlayer.currentTime; else _audioPlayer.currentTime+=5; [_audioPlayer playAtTime:_audioPlayer.currentTime]; } } //左侧按钮手势
-(void)leftLongPress:(UILongPressGestureRecognizer*)longPress { if (longPress.state != UIGestureRecognizerStateBegan) return; if(_audioPlayer.playing) { if(_audioPlayer.currentTime<5) _audioPlayer.currentTime=0; else _audioPlayer.currentTime-=5; [_audioPlayer playAtTime:_audioPlayer.currentTime]; printf("left\n"); } } //雪花函数
-(void)snow { int startX= random()%320; int endX= random()%320; int width= random()%25; CGFloat time= (random()%100)/10+5; CGFloat alp= (random()%9)/10.0+0.1; UIImage* image= [UIImage imageNamed:@"snow.png"]; UIImageView* imageView = [[UIImageView alloc] initWithImage:image]; imageView.frame= CGRectMake(startX,-1*width,width,width); imageView.alpha=alp; [self.view addSubview:imageView]; [UIView beginAnimations:nil context:(__bridge void *)(imageView)]; [UIView setAnimationDuration:time]; if(endX>50&&endX<270) { imageView.frame= CGRectMake(endX, 270-width/2, width, width); } else if((endX>10&&endX<50)||(endX>270&&endX<310)) imageView.frame= CGRectMake(endX, 400-width/2, width, width); else imageView.frame= CGRectMake(endX, 480, width, width); [UIView setAnimationDidStopSelector:@selector(onAnimationComplete:finished:context:)]; [UIView setAnimationDelegate:self]; [UIView commitAnimations]; } -(void)onAnimationComplete:(NSString*)animationID finished:(NSNumber*)finished context:(void*)context { UIImageView* snowView=(__bridge UIImageView *)(context); [snowView removeFromSuperview]; } //封装系统加载函数
-(void)loadMusic:(NSString*)name type:(NSString*)type { NSString* path= [[NSBundle mainBundle] pathForResource: name ofType:type]; NSURL* url = [NSURL fileURLWithPath:path]; _audioPlayer= [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; _audioPlayer.delegate=self; _audioPlayer.volume= 0.5; [_audioPlayer prepareToPlay]; } //音量设置
-(void)volumeSet:(UISlider*)slider { _audioPlayer.volume= slider.value; } -(void)showVolume { volumeSlider.hidden=NO; [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(hideVolume) userInfo:nil repeats:NO]; } -(void)hideVolume { volumeSlider.hidden=YES; } //歌曲进度
-(void)process { Slider.value= 100*_audioPlayer.currentTime/_audioPlayer.duration; } #pragma -mark -doClickActions
//播放
-(void)play:(UIButton*)button { if(_audioPlayer.playing) { [button setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateNormal]; [_audioPlayer pause]; [timer1 invalidate]; } else { [button setImage:[UIImage imageNamed:@"stop.png"] forState:UIControlStateNormal]; timer1=[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(snow) userInfo:nil repeats:YES]; [_audioPlayer play]; } } //上一首
-(void)prier { BOOL playFlag; if(_audioPlayer.playing) { playFlag=YES; [_audioPlayer stop]; } else { playFlag=NO; } songIndex--; if(songIndex<0) songIndex= musicArray.count-1 ; [self loadMusic:[musicArray objectAtIndex:songIndex] type:@"mp3"]; UIImage * image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.jpg",[musicArray objectAtIndex:songIndex]]]; [self setBackground:image]; titleLabel.text= [titleArray objectAtIndex:songIndex]; if(playFlag==YES) { [_audioPlayer play]; } } //下一首
-(void)next { BOOL playFlag; if(_audioPlayer.playing) { playFlag=YES; [_audioPlayer stop]; } else{ playFlag=NO; } songIndex++; if(songIndex==musicArray.count) { songIndex= 0; } [self loadMusic:[musicArray objectAtIndex:songIndex] type:@"mp3"]; UIImage * image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.jpg",[musicArray objectAtIndex:songIndex]]]; [self setBackground:image]; titleLabel.text= [titleArray objectAtIndex:songIndex]; if(playFlag==YES) { [_audioPlayer play]; } } #pragma -mark -AVAudioPlayerDelegate
//播放完成自动切换
-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag { songIndex++; if(songIndex==musicArray.count) songIndex= 0; [self loadMusic:[musicArray objectAtIndex:songIndex] type:@"mp3"]; titleLabel.text= [titleArray objectAtIndex:songIndex]; [_audioPlayer play]; } #pragma -mark -UIImagePickerControllerDelegate
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { [self dismissViewControllerAnimated:YES completion:nil]; } -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo { backImageView.image = image; [self dismissViewControllerAnimated:YES completion:nil]; } -(void)setBackground:(UIImage *)image { backImageView.image = image; } @end