一、项目效果：
点击字母，字母有动画效果，并且发音
二、用到的主要知识
1.产生动画（NSTimer计时器）
2.声音 AVFoundation.framework
三、新建项目，主页面设计如图
四、控制器实现
1.声明代码
#import <AVFoundation/AVFoundation.h>//导入播放音频框架
@interface HomeViewController : UIViewController
{
IBOutlet UIScrollView *myScrollView;
IBOutlet UIButton *buttonA;
IBOutlet UIButton *buttonB;
IBOutlet UIButton *buttonC;
IBOutlet UIButton *buttonD;
IBOutlet UIButton *buttonE;
IBOutlet UIButton *buttonF;
IBOutlet UIButton *buttonG;
IBOutlet UIButton *buttonH;
IBOutlet UIButton *buttonI;
IBOutlet UIButton *buttonJ;
IBOutlet UIButton *buttonK;
IBOutlet UIButton *buttonL;
IBOutlet UIButton *buttonM;
IBOutlet UIButton *buttonN;
IBOutlet UIButton *buttonO;
IBOutlet UIButton *buttonP;
IBOutlet UIButton *buttonQ;
IBOutlet UIButton *buttonR;
IBOutlet UIButton *buttonS;
IBOutlet UIButton *buttonT;
IBOutlet UIButton *buttonU;
IBOutlet UIButton *buttonV;
IBOutlet UIButton *buttonW;
IBOutlet UIButton *buttonX;
IBOutlet UIButton *buttonY;
IBOutlet UIButton *buttonZ;
AVAudioPlayer *audioPlayer;
NSTimer *animationTimer;
int flag;//标记点到的字母
}
//字母的点击事件
- (IBAction)touchA;
- (IBAction)touchB;
- (IBAction)touchC;
- (IBAction)touchD;
- (IBAction)touchE;
- (IBAction)touchF;
- (IBAction)touchG;
- (IBAction)touchH;
- (IBAction)touchI;
- (IBAction)touchJ;
- (IBAction)touchK;
- (IBAction)touchL;
- (IBAction)touchM;
- (IBAction)touchN;
- (IBAction)touchO;
- (IBAction)touchP;
- (IBAction)touchQ;
- (IBAction)touchR;
- (IBAction)touchS;
- (IBAction)touchT;
- (IBAction)touchU;
- (IBAction)touchV;
- (IBAction)touchW;
- (IBAction)touchX;
- (IBAction)touchY;
- (IBAction)touchZ;
- (void)initAudio:(NSString *)string;//初始化声音
- (void)doTimer;//开始计时器
@end
2.实现代码
业务逻辑：点击字母时，判断audioPlayer是否为nil。如果是，就给flag赋值，它的值用来标记所点击的字母。然后执行initAudio方法（用于初始化要播放的声音文件）。由于这个操作是点击字母A的时候发生的，而声音文件名为“A”，所以将initAudio方法的参数设为“A”。
@interface HomeViewController ()
@end
@implementation HomeViewController
- (IBAction)touchA
{
if (audioPlayer == nil) {
flag = 1;
[self initAudio:@"A"];
}
}
- (IBAction)touchB
{
if (audioPlayer == nil) {
flag = 2;
[self initAudio:@"B"];
}
}
- (IBAction)touchC
{
if (audioPlayer == nil) {
flag = 3;
[self initAudio:@"C"];
}
}
- (IBAction)touchD
{
if (audioPlayer == nil) {
flag = 4;
[self initAudio:@"D"];
}
}
- (IBAction)touchE
{
if (audioPlayer == nil) {
flag = 5;
[self initAudio:@"E"];
}
}
- (IBAction)touchF
{
if (audioPlayer == nil) {
flag = 6;
[self initAudio:@"F"];
}
}
- (IBAction)touchG
{
if (audioPlayer == nil) {
flag = 7;
[self initAudio:@"G"];
}
}
- (IBAction)touchH
{
if (audioPlayer == nil) {
flag = 8;
[self initAudio:@"H"];
}
}
- (IBAction)touchI
{
if (audioPlayer == nil) {
flag = 9;
[self initAudio:@"I"];
}
}
- (IBAction)touchJ
{
if (audioPlayer == nil) {
flag = 10;
[self initAudio:@"J"];
}
}
- (IBAction)touchK
{
if (audioPlayer == nil) {
flag = 11;
[self initAudio:@"K"];
}
}
- (IBAction)touchL
{
if (audioPlayer == nil) {
flag = 12;
[self initAudio:@"L"];
}
}
- (IBAction)touchM
{
if (audioPlayer == nil) {
flag = 13;
[self initAudio:@"M"];
}
}
- (IBAction)touchN
{
if (audioPlayer == nil) {
flag = 14;
[self initAudio:@"N"];
}
}
- (IBAction)touchO
{
if (audioPlayer == nil) {
flag = 15;
[self initAudio:@"O"];
}
}
- (IBAction)touchP
{
if (audioPlayer == nil) {
flag = 16;
[self initAudio:@"P"];
}
}
- (IBAction)touchQ
{
if (audioPlayer == nil) {
flag = 17;
[self initAudio:@"Q"];
}
}
- (IBAction)touchR
{
if (audioPlayer == nil) {
flag = 18;
[self initAudio:@"R"];
}
}
- (IBAction)touchS
{
if (audioPlayer == nil) {
flag = 19;
[self initAudio:@"S"];
}
}
- (IBAction)touchT
{
if (audioPlayer == nil) {
flag = 20;
[self initAudio:@"T"];
}
}
- (IBAction)touchU
{
if (audioPlayer == nil) {
flag = 21;
[self initAudio:@"U"];
}
}
- (IBAction)touchV
{
if (audioPlayer == nil) {
flag = 22;
[self initAudio:@"V"];
}
}
- (IBAction)touchW
{
if (audioPlayer == nil) {
flag = 23;
[self initAudio:@"W"];
}
}
- (IBAction)touchX
{
if (audioPlayer == nil) {
flag = 24;
[self initAudio:@"X"];
}
}
- (IBAction)touchY
{
if (audioPlayer == nil) {
flag = 25;
[self initAudio:@"Y"];
}
}
- (IBAction)touchZ
{
if (audioPlayer == nil) {
flag = 26;
[self initAudio:@"Z"];
}
}
- (void)initAudio:(NSString *)string
{
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:[[NSBundle mainBundle] pathForResource:string ofType:@"wav"]];
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
[audioPlayer play];
[self doTimer];
[fileURL release];
}
- (void)doTimer
{
//每隔0.25s就调用一次类中的doAnimation方法，用于实现字母的闪烁效果
animationTimer = [NSTimer scheduledTimerWithTimeInterval:0.25 target:self selector:@selector(doAnimation) userInfo:nil repeats:YES];
}
- (void)doAnimation
{
static int n = 0;
if (audioPlayer.playing == YES)
{
switch (flag)
{
case 1:
if (n%2 == 0)
{
buttonA.highlighted = YES;
n++;
}
else
{
buttonA.highlighted = NO;
n--;
}
break;
case 2:
if (n%2 == 0)
{
buttonB.highlighted = YES;
n++;
}
else
{
buttonB.highlighted = NO;
n--;
}
break;
case 3:
if (n%2 == 0)
{
buttonC.highlighted = YES;
n++;
}
else
{
buttonC.highlighted = NO;
n--;
}
break;
case 4:
if (n%2 == 0)
{
buttonD.highlighted = YES;
n++;
}
else
{
buttonD.highlighted = NO;
n--;
}
break;
case 5:
if (n%2 == 0)
{
buttonE.highlighted = YES;
n++;
}
else
{
buttonE.highlighted = NO;
n--;
}
break;
case 6:
if (n%2 == 0)
{
buttonF.highlighted = YES;
n++;
}
else
{
buttonF.highlighted = NO;
n--;
}
break;
case 7:
if (n%2 == 0)
{
buttonG.highlighted = YES;
n++;
}
else
{
buttonG.highlighted = NO;
n--;
}
break;
case 8:
if (n%2 == 0)
{
buttonH.highlighted = YES;
n++;
}
else
{
buttonH.highlighted = NO;
n--;
}
break;
case 9:
if (n%2 == 0)
{
buttonI.highlighted = YES;
n++;
}
else
{
buttonI.highlighted = NO;
n--;
}
break;
case 10:
if (n%2 == 0)
{
buttonJ.highlighted = YES;
n++;
}
else
{
buttonJ.highlighted = NO;
n--;
}
break;
case 11:
if (n%2 == 0)
{
buttonK.highlighted = YES;
n++;
}
else
{
buttonK.highlighted = NO;
n--;
}
break;
case 12:
if (n%2 == 0)
{
buttonL.highlighted = YES;
n++;
}
else
{
buttonL.highlighted = NO;
n--;
}
break;
case 13:
if (n%2 == 0)
{
buttonM.highlighted = YES;
n++;
}
else
{
buttonM.highlighted = NO;
n--;
}
break;
case 14:
if (n%2 == 0)
{
buttonN.highlighted = YES;
n++;
}
else
{
buttonN.highlighted = NO;
n--;
}
break;
case 15:
if (n%2 == 0)
{
buttonO.highlighted = YES;
n++;
}
else
{
buttonO.highlighted = NO;
n--;
}
break;
case 16:
if (n%2 == 0)
{
buttonP.highlighted = YES;
n++;
}
else
{
buttonP.highlighted = NO;
n--;
}
break;
case 17:
if (n%2 == 0)
{
buttonQ.highlighted = YES;
n++;
}
else
{
buttonQ.highlighted = NO;
n--;
}
break;
case 18:
if (n%2 == 0)
{
buttonR.highlighted = YES;
n++;
}
else
{
buttonR.highlighted = NO;
n--;
}
break;
case 19:
if (n%2 == 0)
{
buttonS.highlighted = YES;
n++;
}
else
{
buttonS.highlighted = NO;
n--;
}
break;
case 20:
if (n%2 == 0)
{
buttonT.highlighted = YES;
n++;
}
else
{
buttonT.highlighted = NO;
n--;
}
break;
case 21:
if (n%2 == 0)
{
buttonU.highlighted = YES;
n++;
}
else
{
buttonU.highlighted = NO;
n--;
}
break;
case 22:
if (n%2 == 0)
{
buttonV.highlighted = YES;
n++;
}
else
{
buttonV.highlighted = NO;
n--;
}
break;
case 23:
if (n%2 == 0)
{
buttonW.highlighted = YES;
n++;
}
else
{
buttonW.highlighted = NO;
n--;
}
break;
case 24:
if (n%2 == 0)
{
buttonX.highlighted = YES;
n++;
}
else
{
buttonX.highlighted = NO;
n--;
}
break;
case 25:
if (n%2 == 0)
{
buttonY.highlighted = YES;
n++;
}
else
{
buttonY.highlighted = NO;
n--;
}
break;
case 26:
if (n%2 == 0)
{
buttonZ.highlighted = YES;
n++;
}
else
{
buttonZ.highlighted = NO;
n--;
}
break;
default:
break;
}
}
else
{
[animationTimer invalidate];
[audioPlayer release];
audioPlayer = nil;
switch (flag)
{
case 1:
buttonA.highlighted = NO;
break;
case 2:
buttonB.highlighted = NO;
break;
case 3:
buttonC.highlighted = NO;
break;
case 4:
buttonD.highlighted = NO;
break;
case 5:
buttonE.highlighted = NO;
break;
case 6:
buttonF.highlighted = NO;
break;
case 7:
buttonG.highlighted = NO;
break;
case 8:
buttonH.highlighted = NO;
break;
case 9:
buttonI.highlighted = NO;
break;
case 10:
buttonJ.highlighted = NO;
break;
case 11:
buttonK.highlighted = NO;
break;
case 12:
buttonL.highlighted = NO;
break;
case 13:
buttonM.highlighted = NO;
break;
case 14:
buttonN.highlighted = NO;
break;
case 15:
buttonO.highlighted = NO;
break;
case 16:
buttonP.highlighted = NO;
break;
case 17:
buttonQ.highlighted = NO;
break;
case 18:
buttonR.highlighted = NO;
break;
case 19:
buttonS.highlighted = NO;
break;
case 20:
buttonT.highlighted = NO;
break;
case 21:
buttonU.highlighted = NO;
break;
case 22:
buttonV.highlighted = NO;
break;
case 23:
buttonW.highlighted = NO;
break;
case 24:
buttonX.highlighted = NO;
break;
case 25:
buttonY.highlighted = NO;
break;
case 26:
buttonZ.highlighted = NO;
break;
default:
break;
}
}
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft);//保持横屏
}
@end