编程实现贪吃蛇游戏界面的主要代码

- (void)viewDidLoad

{

[super
viewDidLoad];

allsheshen=[[NSMutableArray alloc ]
init];

if (time==0)

{

time=1;

}

printf("time=%f",time);

//allsheshen=[[NSMutableArray alloc]
init];

// Do any additional setup after loading
the view from its nib.

tim=[NSTimer
scheduledTimerWithTimeInterval:time
target:self selector:@selector(moveSnake:) userInfo:nil
repeats:YES];
／／实现蛇身的动画移动 通过time来控制移动速度

// [NSTimer
scheduledTimerWithTimeInterval:0.3 target:self
selector:@selector(run) userInfo:nil repeats:YES];

}

- (void)didReceiveMemoryWarning

{

[super
didReceiveMemoryWarning];

// Dispose of any resources that can be
recreated.

}

//获得难度对应的时间

-(void)gettime:(int)nand;

／／设置难度的时间，难度增加蛇移动的速度增快

{ NSLog(@"HUOLAI =======%d",nand);

switch (nand)

{

case
1:

time=1;

break;

case
2:

time=0.9;

break;

case
3:

time=0.8;

break;

case
4:

time=0.7;

break;

case
5:

time=0.6;

break;

case
6:

time=0.5;

break;

case
7:

time=0.4;

break;

case
8:

time=0.3;

break;

case
9:

time=0.2;

break;

case
10:

time=0.1;

break;

default:

break;

}

[tim invalidate];//让原来的失效
执行下面新的

tim=[NSTimer
scheduledTimerWithTimeInterval:time
target:self selector:@selector(moveSnake:) userInfo:nil
repeats:YES];

}

-(IBAction)backToMenu:(id)sender{

[AppDelegate
switchViewController:0];
／／跳转主要界面

state=1;

}

- (IBAction)move:(id)sender {

／／判断蛇的移动方向

UIButton * nowbt=sender;

switch (nowbt.tag)

{

case
100:

a=1;

break;

case
101:

a=2;

break;

case
102:

a=3;

break;

case
103:

a=4;

break;

default:

break;

}

}

//撞墙或者撞到自己

-(void)over

{

[AppDelegate
switchViewController:5];

UIAlertView *
aa=[[UIAlertView
alloc]initWithTitle:@"Game
Over" message:labfenshu.text
delegate:self cancelButtonTitle:@"确定"
otherButtonTitles:nil,
nil];

[aa show];

state=1;

labfenshu.text=@"0";

score=0;

//结束就把身体清除

UISnakeBody * now;

for ( int i=[allsheshen count]-1;i>=0;i--)

{

now=[allsheshen objectAtIndex:i];

[now
removeFromSuperview];

}

//初始化身体数组

allsheshen=[[NSMutableArray alloc]
init];

}

//随机产生坐标

-(void)zuobiao{

x=rand()%15*20+10;

y=rand()%22*20+10;

}

//吃到食物

-(void)eat{

score+=100;

labfenshu.text=[[NSString alloc ]initWithFormat:@"分数%d",score
];

labdian.center=CGPointMake(x, y);

//添加一个节点到m_allBody的尾部

UISnakeBody * labBody=[[UISnakeBody alloc]initWithFrame:CGRectMake(0, 0,
20, 20)];

labBody.backgroundColor=[UIColor yellowColor];

UISnakeBody * lastBody=[[UISnakeBody alloc]initWithFrame:CGRectMake(0, 0,
20, 20)];//蛇尾部

if(allsheshen.count==0)

{

lastBody.center=CGPointMake(ax, ay);

labBody.dir=a;//蛇头的方向

}

else

{

lastBody=allsheshen.lastObject;

labBody.dir=lastBody.dir;//等于最后一个节点的方向

switch
(labBody.dir) {

case 1://up

labBody.center=CGPointMake(lastBody.center.x,lastBody.center.y+20);

break;

case 2://down

labBody.center=CGPointMake(lastBody.center.x,lastBody.center.y-20);

break;

case 3://left

labBody.center=CGPointMake(lastBody.center.x+20,lastBody.center.y);

break;

case 4://right

labBody.center=CGPointMake(lastBody.center.x-20,lastBody.center.y);

break;

default:

break;

}

}

[allsheshen addObject:labBody];//保存到集合

[self.view addSubview:labBody];

}

//检测随机产生的坐标是否和蛇身冲突

-(int)zbchongtu

{

if (allsheshen.count!=0)

{

for (UISnakeBody *
node in
allsheshen)

{

if (x==node.center.x&&y==node.center.y) {

return 2;

}

else

{

return 1;

}

}

}

return YES;

}

-(void)moveSnake:(int)dir

{

NSLog(@"SSSSSS====%f",time);

if (state==0)

{

AppDelegate
* nowdelegate=[UIApplication
sharedApplication].delegate;

[UIView beginAnimations:nil
context:NULL];

[UIView setAnimationDuration:1];

[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft
forView:nowdelegate.window
cache:YES];

ax=labshe.center.x;

ay=
labshe.center.y;

switch
(a) {

case 1://up

self.labshe.center=CGPointMake(labshe.center.x, labshe.center.y-20);

break;

case 2://down

self.labshe.center=CGPointMake(labshe.center.x, labshe.center.y+20);

break;

case 3://left

self.labshe.center=CGPointMake(labshe.center.x-20,
labshe.center.y);

break;

case 4://right

self.labshe.center=CGPointMake(labshe.center.x+20,
labshe.center.y);

break;

default:

break;

}

//撞墙的时候

if (labshe.center.x>[[UIScreen mainScreen]bounds].size.width||labshe.center.x<</span>0||labshe.center.y<</span>0||labshe.center.y>[[UIScreen mainScreen]bounds].size.height)

{

[self over];

}

//撞到自己身体的时候

if
(allsheshen.count!=0)

{

for (UISnakeBody * node in allsheshen)

{

if (labshe.center.x==node.center.x&&labshe.center.y==node.center.y)

{

[self
over];

}

}

}

//当蛇碰到了食物

if(labshe.center.x==labdian.center.x&&

labshe.center.y==labdian.center.y)

{

[self zuobiao];

bool1=[self zbchongtu];

while (bool1==2)

{

printf("684358739467356");

[self zuobiao];

bool1=[self zbchongtu];

}

[self eat];

}

//移动蛇的身体

UISnakeBody
* nowbody;

UISnakeBody
* prebody;

if
(allsheshen.count>0)

{

for ( int i=[allsheshen count]-1;i>0;i--)

{

nowbody=[allsheshen objectAtIndex:i];

prebody=[allsheshen objectAtIndex:i-1];

nowbody.center=prebody.center;

}

UISnakeBody *
first=[allsheshen objectAtIndex:0];

first.center=CGPointMake(ax, ay);

}

}

}

-(void)touchfx:(CGPoint)_cg{

int mx=abs(_cg.x-labshe.center.x);

int my=abs(_cg.y-labshe.center.y);

if (mx>my)

{

if
(_cg.x>labshe.center.x)

{

a=4;

}

else

{

a=3;

}

}

else

{

if
(_cg.y>labshe.center.y)

{

a=2;

}

else

{

a=1;

}

}

}

@end