窓にブラインド的な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) CGPoint begin;
@property (nonatomic) BOOL open;
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor colorWithRed:0.8 green:0.8 blue:1.0 alpha:1];
[self createTitle];
[self createBlinds];
[self createOpenButton];
}
– (void)createTitle
{
for (int i=0; i<4; i++) {
UILabel *title = [[UILabel alloc] init];
title.text = @”BLINDS”;
title.font = [UIFont fontWithName:@”Chalkduster” size:60];
title.textColor = [UIColor lightGrayColor];
[title sizeToFit];
title.center = CGPointMake(160, i * 140);
title.transform = CGAffineTransformMakeRotation(M_PI * 0.2);
[self.view addSubview:title];
}
}
#define BlindTag 1
– (void)createBlinds
{
for (int i=0; i<20; i++) {
float x = 160;
float y = i * 30;
UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 30)];
v.center = CGPointMake(x, y);
v.tag = BlindTag;
v.backgroundColor = [UIColor brownColor];
v.layer.shadowColor = [UIColor whiteColor].CGColor;
v.layer.shadowRadius = 1;
v.layer.shadowOpacity = 0.5;
v.layer.zPosition = 100;
[self.view addSubview:v];
}
}
– (void)createOpenButton
{
UIButton *b = [UIButton buttonWithType:UIButtonTypeCustom];
b.frame = CGRectMake(260, CGRectGetMaxY(self.view.frame) – 70, 50, 60);
b.titleLabel.font = [UIFont systemFontOfSize:20];
[b setTitle:@”↑↓” forState:UIControlStateNormal];
b.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.7];
b.layer.zPosition = 200;
b.layer.cornerRadius = 5;
[self.view addSubview:b];
[b addTarget:self action:@selector(openBlind) forControlEvents:UIControlEventTouchUpInside];
}
– (void)openBlind
{
NSPredicate *pred = [NSPredicate predicateWithFormat:@”tag == %d”, 1];
NSArray *blinds = [self.view.subviews filteredArrayUsingPredicate:pred];
[UIView animateWithDuration:0.1 animations:^{
for (int i=0; i<blinds.count; i++) {
UIView *blind = blinds[i];
blind.layer.transform = self.open ? CATransform3DIdentity : CATransform3DMakeRotation(M_PI * 0.4, 1, 0, 0);
}
} completion:^(BOOL finished) {
[UIView animateWithDuration:1.5 animations:^{
for (int i=0; i<blinds.count; i++) {
UIView *blind = blinds[i];
blind.center = self.open ? CGPointMake(160, i*30): ((UIView *)blinds[0]).center;
}
} completion:^(BOOL finished) {
self.open = !self.open;
}];
}];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
self.begin = [[touches anyObject] locationInView:self.view];
}
– (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInView:self.view];
float dx = p.x – self.begin.x;
[self.view.subviews enumerateObjectsUsingBlock:^(UIView *v, NSUInteger idx, BOOL *stop) {
if (v.tag == BlindTag) {
v.layer.transform = CATransform3DMakeRotation(dx / 160.0, 1, 0, 0);
}
}];
}
@end