発信器をポチポチとふやしてブロードキャストしてみる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 *receivers;
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor colorWithWhite:0.68 alpha:1];
self.receivers = [NSMutableArray array];
}
– (UIView *)addReceiver
{
int cnt = self.receivers.count;
float h = cnt * 20 + 60;
UIView *receiver = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 80, h)];
receiver.backgroundColor = [UIColor colorWithHue:cnt * 0.2 saturation:0.6 brightness:0.8 alpha:1];
[self.view addSubview:receiver];
[self.receivers addObject:receiver];
for (int i=0; i<self.receivers.count; i++) {
UIView *r = self.receivers[i];
r.frame = CGRectMake(r.frame.origin.x, r.frame.origin.y, 80, h);
UIView *newColorBox = [[UIView alloc] initWithFrame:CGRectMake(10, cnt*20 + 10, 60, 16)];
newColorBox.backgroundColor = receiver.backgroundColor;
[r addSubview:newColorBox];
UIView *box = [[UIView alloc] initWithFrame:CGRectMake(10, i*20 + 10, 60, 16)];
box.backgroundColor = r.backgroundColor;
[receiver addSubview:box];
}
NSMutableDictionary *viewsDictionary = [NSMutableDictionary dictionary];
for (int i=0; i<2; i++) {
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.backgroundColor = [UIColor lightGrayColor];
btn.titleLabel.font = [UIFont boldSystemFontOfSize:20];
[btn setTitle:i ? @”+” : @”=” forState:UIControlStateNormal];
[receiver addSubview:btn];
btn.translatesAutoresizingMaskIntoConstraints = NO;
[viewsDictionary setObject:btn forKey:[NSString stringWithFormat:@”btn%d”, i+1]];
[btn addTarget:self action:@selector(send:) forControlEvents:UIControlEventTouchUpInside];
}
// Auto Layout
[receiver addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@”[btn1]-20-[btn2]” options:NSLayoutFormatAlignAllBottom metrics:nil views:viewsDictionary]];
[receiver addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@”V:[btn1(20)]-10-|” options:0 metrics:nil views:viewsDictionary]];
[receiver addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@”V:[btn2(20)]-10-|” options:0 metrics:nil views:viewsDictionary]];
return receiver;
}
– (void)send:(UIButton *)sender
{
NSString *word = sender.titleLabel.text;
UIView *transmitter = sender.superview;
for (int i=0; i<self.receivers.count; i++) {
UIView *receiver = self.receivers[i];
[receiver.subviews enumerateObjectsUsingBlock:^(UIView *v, NSUInteger idx, BOOL *stop) {
if ([v.backgroundColor isEqual:transmitter.backgroundColor]) {
UILabel *l = [[UILabel alloc] init];
l.text = word;
l.textColor = [UIColor whiteColor];
l.font = [UIFont boldSystemFontOfSize:20];
[l sizeToFit];
float oy = l.center.y;
l.center = [v convertPoint:sender.center fromView:transmitter];
[UIView animateWithDuration:0.3 animations:^{
l.center = CGPointMake(v.tag * 15 + 10, oy);
}];
[v addSubview:l];
v.tag = v.tag + 1;
}
}];
}
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInView:self.view];
if (self.view == [self.view hitTest:p withEvent:nil]) {
UIView *v = [self addReceiver];
v.center = p;
}
}
@end