０から９のすうじを足してみよう。
まちがえると食べられちゃうぞ！
という感じで、iPhone用、たし算アプリの作り方を書いてみる。
ポイント
UILabelを回答用に１０枚、問題用に２枚配置しています。
問題用のラベルに数字を設定するタイミングで、
こたえを保持、回答の数字が押されたときに比較して
結果に応じたアニメーション、正解なら次の問題を表示、
不正解なら、口を閉じるような動きをさせています。
環境
今回つくったiPhoneアプリサンプルは、
XcodeのiOS6 iPhone Simulatorで動かしています。
サンプルコード
#import “ViewController.h”
@interface ViewController () {
int answer;
UILabel *left;
UILabel *right;
NSMutableArray *panels;
}
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [self getColorAtIndex:0];
[self createQuestionBox];
[self createAnswerPanel];
[self setQuestion];
}
– (void)createQuestionBox
{
left = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
left.font = [UIFont systemFontOfSize:80];
left.textAlignment = 1;
left.text = @”0″;
left.backgroundColor = [self getColorAtIndex:1];
left.center = CGPointMake(60, 160);
left.textColor = [self getColorAtIndex:2];
[self.view addSubview:left];
UILabel *plus = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
plus.font = [UIFont systemFontOfSize:80];
plus.center = CGPointMake(160, 160);
plus.backgroundColor = [UIColor clearColor];
plus.textColor = [self getColorAtIndex:2];
plus.textAlignment = 1;
plus.text = @”+”;
[self.view addSubview:plus];
right = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
right.font = [UIFont systemFontOfSize:80];
right.center = CGPointMake(260, 160);
right.textColor = [self getColorAtIndex:2];
right.textAlignment = 1;
right.text = @”0″;
right.backgroundColor = [self getColorAtIndex:4];
[self.view addSubview:right];
}
– (void)createAnswerPanel
{
panels = [[NSMutableArray alloc] init];
for (int i=0; i<10; i++) {
float x = (i % 5) * 60 + 20;
float y = (i / 5) * 100 + 300;
UILabel *ans = [[UILabel alloc] initWithFrame:CGRectMake(x, y, 40, 40)];
ans.font = [UIFont systemFontOfSize:30];
ans.textColor = [self getColorAtIndex:3];
ans.textAlignment = 1;
ans.text = [NSString stringWithFormat:@”%d”, i];
ans.backgroundColor = [self getColorAtIndex:2];
[self.view addSubview:ans];
[panels addObject:ans];
ans.userInteractionEnabled = YES;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];
[ans addGestureRecognizer:tap];
}
}
– (void)setQuestion
{
answer = arc4random() % 9;
int leftNum = arc4random() % (answer + 1);
int rightNum = answer – leftNum;
left.text = [NSString stringWithFormat:@”%d”, leftNum];
right.text = [NSString stringWithFormat:@”%d”, rightNum];
}
– (void)tap:(UITapGestureRecognizer*)gr
{
if (answer == [((UILabel*)gr.view).text intValue]) {
[UIView animateWithDuration:0.5 animations:^{
gr.view.transform = CGAffineTransformMakeScale(1.5, 1.5);
left.transform = CGAffineTransformMakeTranslation(-200, 0);
right.transform = CGAffineTransformMakeTranslation(200, 0);
} completion:^(BOOL finished) {
[self setQuestion];
[UIView animateWithDuration:0.5 animations:^{
gr.view.transform = CGAffineTransformIdentity;
left.transform = CGAffineTransformIdentity;
right.transform = CGAffineTransformIdentity;
}];
}];
} else {
for (UIView *v in panels) {
[UIView animateWithDuration:0.5 animations:^{
v.transform = CGAffineTransformMakeTranslation(0 , 370 – v.center.y);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.5 animations:^{
v.transform = CGAffineTransformIdentity;
}];
}];
}
}
}
#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*)getColorAtIndex:(int)i
{
switch (i) {
case 0:
return UIColorHex(0x6251E8);
break;
case 1:
return UIColorHex(0x32FFC8);
break;
case 2:
return UIColorHex(0xFF3F4B);
break;
case 3:
return UIColorHex(0xE8BD61);
break;
default:
return UIColorHex(0xCAFFB4);
break;
}
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end