はてなブックマーク

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UIImage *(^createImageFromUIColor)(UIColor *) = ^(UIColor *color) { CGRect rect = CGRectMake(0, 0, 1, 1); UIGraphicsBeginImageContext(rect.size); CGContextRef contextRef = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(contextRef, [color CGColor]); CGContextFillRect(contextRef, rect); UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return img

ナビゲーションバーの戻るボタンのタイトルを変更するには、 【戻るボタンが表示される前の画面】で設定する。 例：ViewController1 から ViewController2 に遷移する場合 ViewController1 の viewDidLoad などで UIBarButtonItem *backButton = [[[UIBarButtonItem alloc] init] autorelease]; backButton.title = @"前の画面に戻ります"; if(iOS5以降なら) { // 戻るボタンの色を変えたい場合は、tintColor に UIColor をセットする backButton.tintColor = [UIColor redColor]; } self.navigationItem.backBarButtonItem = backButton;

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