Flappy Bird

愤怒的小鸟这个游戏非常经典，火了很长一段时间

我们可以不借助第三方库进行实现，这里只是进行了一些简单的实现

没有添加碰撞检测  完成了一些功能 我们点击屏幕小鸟会飞

如果不点击小鸟会落下 

这里用到的技术也很简单，用到了用户交互，transform 动画 

#import "BirdViewController.h"//初速const float MaxTime = 30;//加速度 方向向下const float VG = 0.05;//初速度const float MaxV = 2.5;//初始化总路程const float AllLength = 692;typedef enum{    GameStart,    GamePlaying,    GameOver} GameState;@interface BirdViewController (){    NSTimer *birdTimer;    //开始游戏开关    BOOL isStart;    //游戏状态    GameState gameState;    //小鸟    UIImageView *birdImgView;    UIImageView *birdClotherView;    //总场景    UIView *playLayer;    //跳跃时间    float maxJumpTime;}@end@implementation BirdViewController- (void)viewDidLoad {    [super viewDidLoad];    self.view.backgroundColor =[UIColor orangeColor];    [self initBirdAndOther];    birdTimer = [NSTimer scheduledTimerWithTimeInterval:0.008 target:self selector:@selector(update) userInfo:nil repeats:YES];}-(void)update{    //判断    if (isStart == YES && gameState == GamePlaying)    {        [self updateBird];    }}-(void)initBirdAndOther{    playLayer = [[UIView alloc]initWithFrame:self.view.bounds];        [self.view addSubview:playLayer];        //添加手势    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(screenTap)];    [self.view addGestureRecognizer:tapGesture];        birdClotherView = (UIImageView *)[[UIView alloc]initWithFrame:CGRectMake(60, 300, 40, 30)];        [playLayer addSubview:birdClotherView];        //初始化小鸟    birdImgView = [[UIImageView alloc] init];       birdImgView.frame = CGRectMake(0, 0, 40, 28);    birdImgView.image = [UIImage imageNamed:@"bird"];    [birdClotherView addSubview:birdImgView];        UILabel *label = [[UILabel alloc]init];    label.frame = CGRectMake(20, 30, 100, 30);    label.text = @"愤怒的小鸟";    [self.view addSubview:label];     }-(void)screenTap{    //每点击一次    maxJumpTime = MaxTime;    if (isStart == NO) {        isStart = YES;        gameState = GamePlaying;        for (UIView *tmp in self.view.subviews) {            [tmp removeFromSuperview];        }        [self initBirdAndOther];    }    CGAffineTransform transform =  CGAffineTransformIdentity;    birdImgView.transform = CGAffineTransformRotate(transform,  -30 * M_PI / 180 );}- (void) updateBird{    maxJumpTime --;    CGRect rect = birdClotherView.frame;        if (maxJumpTime >= 0)    {        rect.origin.y = rect.origin.y - (MaxV - (MaxTime - maxJumpTime)*VG);    }    else    {        //俯角30度旋转        CGAffineTransform transform = CGAffineTransformIdentity;        birdImgView.transform = CGAffineTransformRotate(transform,  30 * M_PI / 180 );        rect.origin.y = rect.origin.y - (maxJumpTime*VG);    }    birdClotherView.frame = rect;   }@end