【代码笔记】iOS-看图听故事

一，效果图。

二，工程图。

三，代码。

RootViewController.h

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#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
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RootViewController.m

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#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
");
    }
}
//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
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原文地址：https://www.cnblogs.com/yang-guang-girl/p/5394039.html