上からつぎつぎに落ちてくるタマゴをキャッチ！落として割れたら大変だよ！というゲームをレトロなゲームウォッチ風のiPhoneアプリとして書いてみます。
動作イメージ
XcodeからiOS6 iPhone Simulatorで動かすとこんな感じになります。
ポイント
動きはスムーズではなく、点滅しながらのほうがそれっぽいので、animationをかけずにタイマーの間隔を0.5秒くらいに設定して、そのつどタマゴとプレーヤーを表示するようにしています。スコアボードには、DBLCDTempBlackというフォントを利用しています。
サンプルコード
#import “ViewController.h”
#import <QuartzCore/QuartzCore.h>
@interface ViewController () {
int eggPosition[5]; // 横の位置５ 高さ位置6
int playerPosition; // 横の位置６ 高さ無し
NSTimer *gameTimer;
UIImageView *player;
UIImage *egg;
UIImage *humptydumpty;
UIImageView *eggA, *eggB, *eggC, *eggD, *eggE;
UILabel *score;
}
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
[self createArrowKey];
[self createPlayer];
[self createEggs];
[self createScore];
[self start];
}
– (void)createPlayer
{
UIImage *image = [UIImage imageNamed:@”player”];
player = [[UIImageView alloc] initWithImage:image];
player.frame= CGRectMake(0, 160, 80, 60);
[self.view addSubview:player];
playerPosition = 0;
[self showPlayer];
}
– (void)showPlayer
{
float x = playerPosition * 60 + 100;
player.center = CGPointMake(x, player.center.y);
}
– (void)createArrowKey
{
CGRect rect = [self getFrame];
UIView *right = [[UIView alloc] initWithFrame:CGRectMake(rect.size.width – 80, rect.size.height – 70, 40, 40)];
right.backgroundColor = [UIColor blackColor];
right.layer.cornerRadius = 5;
right.alpha = 0.8;
right.tag = 1;
[self.view addSubview:right];
UIView *left = [[UIView alloc] initWithFrame:CGRectMake(40, rect.size.height – 70, 40, 40)];
left.backgroundColor = [UIColor blackColor];
left.layer.cornerRadius = 5;
left.alpha = 0.8;
left.tag = 2;
[self.view addSubview:left];
NSArray *arrows = @[right, left];
for (UIView *v in arrows) {
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
[v addGestureRecognizer:tap];
}
}
– (void)move:(UITapGestureRecognizer*)gr
{
if (gr.view.tag == 1 && playerPosition < 6) {
// right
playerPosition ++;
} else if (gr.view.tag == 2 && playerPosition > 0) {
// left
playerPosition –;
}
[self showPlayer];
}
– (CGRect)getFrame
{
float w = self.view.bounds.size.width;
float h = self.view.bounds.size.height;
if (w > h) {
return CGRectMake(0, 0, w, h);
}
return CGRectMake(0, 0, h, w);
}
– (void)createEggs
{
egg = [UIImage imageNamed:@”egg”];
humptydumpty = [UIImage imageNamed:@”eggBroken”];
eggA = [[UIImageView alloc] initWithImage:egg];
eggB = [[UIImageView alloc] initWithImage:egg];
eggC = [[UIImageView alloc] initWithImage:egg];
eggD = [[UIImageView alloc] initWithImage:egg];
eggE = [[UIImageView alloc] initWithImage:egg];
NSArray *eggs = @[eggA, eggB, eggC, eggD, eggE];
for (UIView *v in eggs) {
v.frame = CGRectMake(0, 0, 20, 30);
[self.view addSubview:v];
}
[self showEggs];
}
– (void)showEggs
{
NSArray *eggs = @[eggA, eggB, eggC, eggD, eggE];
for (int i=0; i<5; i++) {
UIImageView *v = [eggs objectAtIndex:i];
float x = 110 + i * 60;
float y = eggPosition[i] * 50 – 50;
v.center = CGPointMake(x, y);
v.alpha = 1.0;
if (eggPosition[i] > 4) {
[self catchCheck:i view:v];
}
}
}
– (void)catchCheck:(int)eggNo view:(UIImageView*)v
{
if (eggNo == playerPosition) {
// ok! catch
[self scoreup];
[UIView animateWithDuration:0.4 animations:^{
v.transform = CGAffineTransformMakeTranslation(0, –20);
v.alpha = 0;
eggPosition[eggNo] = 0;
} completion:^(BOOL finished) {
v.transform = CGAffineTransformIdentity;
}];
} else {
// broken
v.image = humptydumpty;
[UIView animateWithDuration:0.7 animations:^{
v.alpha = 0;
eggPosition[eggNo] = 0;
} completion:^(BOOL finished) {
v.image = egg;
v.alpha = 1;
}];
}
}
– (void)start
{
gameTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/2.0 target:self selector:@selector(tick:) userInfo:nil repeats:YES];
}
– (void)tick:(NSTimer*)sender
{
// random egg
int rand = arc4random() % 20;
if (rand < 5 && eggPosition[rand] == 0) {
eggPosition[rand] = 1;
}
for (int i=0; i<5; i++) {
if (eggPosition[i] > 0) {
eggPosition[i]++;
}
}
[self showEggs];
}
– (void)createScore
{
score = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 80, 30)];
score.text = [NSString stringWithFormat:@”%04d”, 0];
score.font = [UIFont fontWithName:@”DBLCDTempBlack” size:30];
score.backgroundColor = [UIColor clearColor];
[self.view addSubview:score];
}
– (void)scoreup
{
int current = [score.text intValue];
score.text = [NSString stringWithFormat:@”%04d”, current + 10];
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end