クジラをタッチすると、背中から潮を噴き出します！という単純なiPhoneアプリを作っていきます。
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
UILongPressGestureRecognizerを使って、タッチでタイマーをスタートして、指を離してから、1.5秒後にタイマーを停止するようにしました。遅延はperformSelectorを使っています。
サンプルコード
#import “ViewController.h”
#import <QuartzCore/QuartzCore.h>
@interface WaterDrop : UIView
@property (nonatomic, assign) CGPoint velocity;
@end
@implementation WaterDrop
@synthesize velocity;
@end
@interface ViewController ()
{
UIView *seaFront;
UIView *whale;
NSTimer *timer;
float tcounter;
BOOL stop;
}
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [self color:0];
[self createSea];
[self createWhale];
}
– (void)createSea
{
UIView *sea = [[UIView alloc] initWithFrame:CGRectMake(0, 300, 320, 256)];
sea.backgroundColor = [self color:2];
[self.view addSubview:sea];
UIBezierPath *path = [[UIBezierPath alloc] init];
[path moveToPoint:CGPointZero];
for (int i=0; i<6; i++) {
[path addQuadCurveToPoint:CGPointMake(i * 60 + 60, 0) controlPoint:CGPointMake(i*60 + 30, 30)];
}
[path addLineToPoint:CGPointMake(320, 500)];
[path addLineToPoint:CGPointMake(0, 500)];
[path closePath];
CAShapeLayer *sl = [CAShapeLayer layer];
sl.fillColor = sea.backgroundColor.CGColor;
sl.path = path.CGPath;
seaFront = [[UIView alloc] initWithFrame:CGRectMake(0, 400, 320, 256)];
[self.view addSubview:seaFront];
[seaFront.layer addSublayer:sl];
CABasicAnimation *wave = [CABasicAnimation animationWithKeyPath:@”transform.translation.x”];
wave.autoreverses = YES;
wave.duration = 2.0;
wave.toValue = @50;
wave.repeatCount = HUGE_VAL;
[sl addAnimation:wave forKey:nil];
}
– (void)createWhale
{
UIBezierPath *path = [[UIBezierPath alloc] init];
[path moveToPoint:CGPointMake(0, 130)];
[path addCurveToPoint:CGPointMake(150, 130) controlPoint1:CGPointMake(0, 10) controlPoint2:CGPointMake(150, 10)];
[path closePath];
[path moveToPoint:CGPointMake(130, 130)];
[path addLineToPoint:CGPointMake(180, 80)];
[path addLineToPoint:CGPointMake(180, 130)];
[path closePath];
CAShapeLayer *sl = [CAShapeLayer layer];
sl.fillColor = [self color:1].CGColor;
sl.path = path.CGPath;
whale = [[UIView alloc] initWithFrame:CGRectMake(70, 300, 180, 100)];
[self.view insertSubview:whale belowSubview:seaFront];
[whale.layer addSublayer:sl];
UIView *eye = [[UIView alloc] initWithFrame:CGRectMake(30, 90, 5, 5)];
eye.backgroundColor = [self color:0];
eye.layer.cornerRadius = 2.5;
[whale addSubview:eye];
UILongPressGestureRecognizer *press = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(press:)];
press.minimumPressDuration = 0;
[whale addGestureRecognizer:press];
}
– (void)press:(UILongPressGestureRecognizer*)gr
{
if (gr.state == UIGestureRecognizerStateBegan) {
stop = NO;
timer = [NSTimer scheduledTimerWithTimeInterval:1.0/60.0 target:self selector:@selector(spouts:) userInfo:nil repeats:YES];
} else {
stop = YES;
[timer performSelector:@selector(invalidate) withObject:nil afterDelay:2.0];
}
}
– (void)spouts:(NSTimer*)sender
{
tcounter += sender.timeInterval;
if (tcounter > 0.1 && !stop) {
WaterDrop *wdrop = [[WaterDrop alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
[self.view addSubview:wdrop];
wdrop.backgroundColor = [self color:1];
wdrop.center = CGPointMake(140, 330);
wdrop.layer.cornerRadius = 5.0;
int seed = (1 – arc4random() % 3);
wdrop.velocity = CGPointMake(2 * seed, –20);
[self.view addSubview:wdrop];
tcounter = 0;
}
for (UIView *v in self.view.subviews) {
if ([v isKindOfClass:[WaterDrop class]]) {
WaterDrop *wd = (WaterDrop*)v;
wd.velocity = CGPointMake(wd.velocity.x, wd.velocity.y + 1);
wd.center = CGPointMake(wd.center.x + wd.velocity.x, wd.center.y + wd.velocity.y);
if (wd.center.y > 568) {
[wd removeFromSuperview];
}
}
}
}
#define UIColorHex(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
– (UIColor*)color:(int)i
{
switch (i) {
case 0:
return UIColorHex(0xFAFAFA);
case 1:
return UIColorHex(0x026BB5);
case 2:
return UIColorHex(0x00AAE3);
case 3:
return UIColorHex(0xFF7729);
case 4:
return UIColorHex(0x474747);
default:
break;
}
return nil;
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end