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拙作のArrow NoteではinputAccessoryViewにUIToolbarを使っています。これはボタンを配置するのが楽ちんなのですが、iOS7になってキーボードに色を合わせるのに苦労しました。というのも、UIToolbarはtintとかいうエフェクトが掛かって、単にキーボードと同じ色に設定しても駄目なのです。というわけで、試行錯誤した結果を共有いたします。

@interface ViewController : UIViewController
@property IBOutlet UITextView *textView;

@implementation ViewController
- (void)viewDidLoad
    [super viewDidLoad];
    UIToolbar *toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
    if (self.textView.keyboardAppearance == UIKeyboardAppearanceAlert) {
        toolBar.barTintColor = [UIColor colorWithWhite:0.246 alpha:1];
    else {
        toolBar.barTintColor = [UIColor colorWithRed:0.797 green:0.812 blue:0.840 alpha:1.000];
    self.textView.inputAccessoryView = toolBar;

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Help us understand the problem. What are the problem?