logの値を２進数の01010101に概算してみるiPhoneアプリのサンプルコードを描いてみます。
#import “ViewController.h”
@interface ViewController ()
@property (nonatomic, strong) NSMutableArray *cells;
@property (nonatomic) int count;
@property (nonatomic) float value;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor blackColor];
[self createCells];
[self showLogx];
self.value = 2.0;
}
– (void)createCells {
self.cells = [NSMutableArray array];
CGPoint start = CGPointMake(20, 190);
float w = (CGRectGetMaxX(self.view.bounds) – 40) / 7.0;
for (int i=0; i<49; i++) {
float x = (i % 7) * w + start.x;
float y = (i / 7) * w + start.y;
UIView *cell = [[UIView alloc] initWithFrame:CGRectMake(x, y, w, w)];
cell.backgroundColor = [UIColor colorWithHue:0.2 saturation:0.3 brightness:1 alpha:1];
cell.layer.borderWidth = 1.0;
[self.view addSubview:cell];
[self.cells addObject:cell];
if ((i%7) == 0 && i < 42) {
cell.backgroundColor = [UIColor lightGrayColor];
UILabel *l = [[UILabel alloc] initWithFrame:cell.bounds];
l.text = [NSString stringWithFormat:@”%d”, -i / 7];
l.textColor = [UIColor colorWithHue:0.2 saturation:0.3 brightness:1 alpha:1];
l.textAlignment = NSTextAlignmentCenter;
l.font = [UIFont boldSystemFontOfSize:20];
[cell addSubview:l];
}
if (i==42) {
cell.backgroundColor = [UIColor lightGrayColor];
UILabel *l = [[UILabel alloc] initWithFrame:cell.bounds];
l.text = @”x>10″;
l.textColor = [UIColor colorWithHue:0.2 saturation:0.3 brightness:1 alpha:1];
l.textAlignment = NSTextAlignmentCenter;
l.font = [UIFont boldSystemFontOfSize:20];
[cell addSubview:l];
} else if (i > 42) {
cell.backgroundColor = [UIColor orangeColor];
}
}
}
– (void)showLogx {
UILabel *logx = [[UILabel alloc] init];
NSMutableAttributedString *atts = [[NSMutableAttributedString alloc] initWithString:@”log102″];
[atts addAttribute:NSForegroundColorAttributeName value:[UIColor whiteColor] range:NSMakeRange(0, 6)];
UIFont *fontA = [UIFont fontWithName:@”ChalkboardSE-Light” size:50.0];
NSDictionary *attrsDictionaryA = @{NSFontAttributeName:fontA};
[atts addAttributes:attrsDictionaryA range:NSMakeRange(0, 3)];
[atts addAttributes:attrsDictionaryA range:NSMakeRange(5, 1)];
UIFont *fontB = [UIFont fontWithName:@”ChalkboardSE-Light” size:25.0];
NSDictionary *attrsDictionaryB = @{NSFontAttributeName:fontB, NSBaselineOffsetAttributeName:@25};
[atts addAttributes:attrsDictionaryB range:NSMakeRange(3, 2)];
// vertical align
[atts addAttributes:@{NSBaselineOffsetAttributeName:@-5} range:NSMakeRange(3, 2)];
logx.attributedText = atts;
[logx sizeToFit];
logx.center = CGPointMake(CGRectGetMidX(self.view.bounds), 130);
[self.view addSubview:logx];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
if (self.count > 5) {
return;
}
int row = self.count + 1;
int col = self.count;
int idx = row + col * 7;
UIView *cell = self.cells[idx];
BOOL divide = NO;
if (self.value > 10) {
self.value *= 0.1;
divide = YES;
}
for (int i=0; i<2; i++) {
UILabel *l1 = [[UILabel alloc] init];
l1.text = [NSString stringWithFormat:@”%.2f”, self.value];
if (divide) {
l1.numberOfLines = 2;
l1.text = [l1.text stringByAppendingString:@”\n×10″];
}
l1.transform = CGAffineTransformMakeRotation(M_PI * 0.2);
[l1 sizeToFit];
[cell addSubview:l1];
l1.center = CGPointMake(CGRectGetMidX(cell.bounds), CGRectGetMidY(cell.bounds));
if (i == 0) {
l1.center = cell.center;
[self.view addSubview:l1];
[UIView animateWithDuration:0.4 animations:^{
l1.center = CGPointMake(cell.center.x, cell.center.y + (6 – col) * cell.bounds.size.height);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.1 animations:^{
l1.layer.transform = CATransform3DRotate(l1.layer.transform, M_PI*0.5, 0, 1, 0);
} completion:^(BOOL finished) {
l1.text = divide ? @”1″ : @”0″;
[l1 sizeToFit];
[UIView animateWithDuration:0.1 animations:^{
l1.layer.transform = CATransform3DRotate(l1.layer.transform, –M_PI*0.5, 0, 1, 0);
l1.layer.transform = CATransform3DScale(l1.layer.transform, 2.0, 2.0, 1.00);
}];
}];
}];
}
}
self.value *= self.value;
++self.count;
}
– (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end