選択した文字の色とフォントをボタンで変えて遊べるようなiPhoneアプリを描いてみます。（NSMutableAttributedStringを使ってみました。）
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。
サンプルコード
#import “ViewController.h”
@interface ViewController () <UITextViewDelegate>
@property (weak, nonatomic) UITextView *textView;
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
[self createWords];
[self createColorButtons];
[self createFontButtons];
}
– (void)createWords
{
NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@”Today is the first day.”];
[str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@”AvenirNext-Regular” size:70.0] range:NSMakeRange(0, 23)];
UITextView *textView = [[UITextView alloc] initWithFrame:self.view.bounds];
textView.delegate = self;
textView.attributedText = str;
[self.view addSubview:textView];
self.textView = textView;
UIView *dummyView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
textView.inputView = dummyView;
[UIMenuController sharedMenuController].menuVisible = NO;
}
– (void)createColorButtons
{
NSArray *colors = @[[UIColor blackColor], [UIColor orangeColor], [UIColor purpleColor]];
float x = 20;
for (UIColor *color in colors) {
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(x, 410, 40, 40);
btn.backgroundColor = color;
[self.view addSubview:btn];
[btn addTarget:self action:@selector(changeColor:) forControlEvents:UIControlEventTouchUpInside];
x+= 50;
}
}
– (void)changeColor:(UIButton*)sender
{
NSMutableAttributedString *mat = [self.textView.attributedText mutableCopy];
[mat addAttribute:NSForegroundColorAttributeName value:sender.backgroundColor range:self.textView.selectedRange];
self.textView.attributedText = mat;
}
– (void)createFontButtons
{
//AvenirNext-Heavy
//AvenirNext-UltraLight
//ChalkboardSE-Regular
NSArray *fonts = @[[UIFont fontWithName:@”AvenirNext-Heavy” size:80],
[UIFont fontWithName:@”AvenirNext-UltraLight” size:80],
[UIFont fontWithName:@”ChalkboardSE-Regular” size:80],];
float x = 160;
for (UIFont *font in fonts) {
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(x, 480, 40, 40);
btn.backgroundColor = [UIColor lightGrayColor];
[btn setTitle:@”A” forState:UIControlStateNormal];
btn.titleLabel.font = [font fontWithSize:40];
[self.view addSubview:btn];
[btn addTarget:self action:@selector(changeFont:) forControlEvents:UIControlEventTouchUpInside];
x+= 50;
}
}
– (void)changeFont:(UIButton*)sender
{
NSMutableAttributedString *mat = [self.textView.attributedText mutableCopy];
[mat addAttribute:NSFontAttributeName value:[sender.titleLabel.font fontWithSize:80] range:self.textView.selectedRange];
self.textView.attributedText = mat;
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end