アラートを使用してUIButtonの背景を変更する方法

Question

現在、UIAlertviewを使用してボタン画像を変更するアプリを開発中です。 これを試しましたが、動作していないようです！この問題については お手伝いください！ Rafee

- (IBAction)changebackground:(id)sender { 
    UIAlertView *alert = [[UIAlertView alloc] 

         initWithTitle:@"The Title" 
         message:@"The Message" 
         delegate:self 
         cancelButtonTitle:@"Cancel" 
         otherButtonTitles:@"normal",@"for girly girls",@"for boys!", nil]; 

[alert show]; 
} 

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { 

if (buttonIndex == 1) { 

    UIImage *img = [UIImage imageNamed:@"img1.jpg"]; 

    [background setImage:img]; 

    UIImage *buttonImage = [UIImage imageNamed:@"black sharp.png"]; 
    [asharp setImage:buttonImage forState:UIControlStateNormal]; 
    [self.view addSubview:asharp]; 
    UIImage *buttonImage2 = [UIImage imageNamed:@"black sharp.png"]; 
    [csharp setImage:buttonImage2 forState:UIControlStateNormal]; 
    [self.view addSubview:csharp]; 
    UIImage *buttonImage3 = [UIImage imageNamed:@"black sharp.png"]; 
    [dsharp setImage:buttonImage3 forState:UIControlStateNormal]; 
    [self.view addSubview:dsharp]; 
    UIImage *buttonImage4 = [UIImage imageNamed:@"black sharp.png"]; 
    [fsharp setImage:buttonImage4 forState:UIControlStateNormal]; 
    [self.view addSubview:fsharp]; 
    UIImage *buttonImage5 = [UIImage imageNamed:@"black sharp.png"]; 
    [gsharp setImage:buttonImage5 forState:UIControlStateNormal]; 
    [self.view addSubview:gsharp]; 
    UIImage *buttonImage6 = [UIImage imageNamed:@"white key.png"]; 
    [middlec setImage:buttonImage6 forState:UIControlStateNormal]; 
    [self.view addSubview:middlec]; 
    UIImage *buttonImage7 = [UIImage imageNamed:@"white key.png"]; 
    [d setImage:buttonImage7 forState:UIControlStateNormal]; 
    [self.view addSubview:d]; 
    UIImage *buttonImage8 = [UIImage imageNamed:@"white key.png"]; 
    [en setImage:buttonImage8 forState:UIControlStateNormal]; 
    [self.view addSubview:en]; 
    UIImage *buttonImage9 = [UIImage imageNamed:@"white key.png"]; 
    [f setImage:buttonImage9 forState:UIControlStateNormal]; 
    [self.view addSubview:f]; 
    UIImage *buttonImage10 = [UIImage imageNamed:@"white key.png"]; 
    [g setImage:buttonImage10 forState:UIControlStateNormal]; 
    [self.view addSubview:g]; 
    UIImage *buttonImage11 = [UIImage imageNamed:@"white key.png"]; 
    [a setImage:buttonImage11 forState:UIControlStateNormal]; 
    [self.view addSubview:a]; 
    UIImage *buttonImage12 = [UIImage imageNamed:@"white key.png"]; 
    [b setImage:buttonImage12 forState:UIControlStateNormal]; 
    [self.view addSubview:b]; 


} 

if (buttonIndex == 2) { 

    UIImage *img = [UIImage imageNamed:@"img2.jpg"]; 

    [background setImage:img]; 

    UIImage *buttonImage = [UIImage imageNamed:@"green sharp.png"]; 
    [asharp setImage:buttonImage forState:UIControlStateNormal]; 
    [self.view addSubview:asharp]; 
    UIImage *buttonImage2 = [UIImage imageNamed:@"green sharp.png"]; 
    [csharp setImage:buttonImage2 forState:UIControlStateNormal]; 
    [self.view addSubview:csharp]; 
    UIImage *buttonImage3 = [UIImage imageNamed:@"green sharp.png"]; 
    [dsharp setImage:buttonImage3 forState:UIControlStateNormal]; 
    [self.view addSubview:dsharp]; 
    UIImage *buttonImage4 = [UIImage imageNamed:@"green sharp.png"]; 
    [fsharp setImage:buttonImage4 forState:UIControlStateNormal]; 
    [self.view addSubview:fsharp]; 
    UIImage *buttonImage5 = [UIImage imageNamed:@"green sharp.png"]; 
    [gsharp setImage:buttonImage5 forState:UIControlStateNormal]; 
    [self.view addSubview:gsharp]; 
    UIImage *buttonImage6 = [UIImage imageNamed:@"pink key.png"]; 
    [middlec setImage:buttonImage6 forState:UIControlStateNormal]; 
    [self.view addSubview:middlec]; 
    UIImage *buttonImage7 = [UIImage imageNamed:@"pink key.png"]; 
    [d setImage:buttonImage7 forState:UIControlStateNormal]; 
    [self.view addSubview:d]; 
    UIImage *buttonImage8 = [UIImage imageNamed:@"pink key.png"]; 
    [en setImage:buttonImage8 forState:UIControlStateNormal]; 
    [self.view addSubview:en]; 
    UIImage *buttonImage9 = [UIImage imageNamed:@"pink key.png"]; 
    [f setImage:buttonImage9 forState:UIControlStateNormal]; 
    [self.view addSubview:f]; 
    UIImage *buttonImage10 = [UIImage imageNamed:@"pink key.png"]; 
    [g setImage:buttonImage10 forState:UIControlStateNormal]; 
    [self.view addSubview:g]; 
    UIImage *buttonImage11 = [UIImage imageNamed:@"pink key.png"]; 
    [a setImage:buttonImage11 forState:UIControlStateNormal]; 
    [self.view addSubview:a]; 
    UIImage *buttonImage12 = [UIImage imageNamed:@"pink key.png"]; 
    [b setImage:buttonImage12 forState:UIControlStateNormal]; 
    [self.view addSubview:b]; 
} 

if (buttonIndex == 3) { 

    UIImage *img = [UIImage imageNamed:@"img3.jpg"]; 

    [background setImage:img]; 

    UIImage *buttonImage = [UIImage imageNamed:@"orange sharp.png"]; 
    [asharp setImage:buttonImage forState:UIControlStateNormal]; 
    [self.view addSubview:asharp]; 
    UIImage *buttonImage2 = [UIImage imageNamed:@"orange sharp.png"]; 
    [csharp setImage:buttonImage2 forState:UIControlStateNormal]; 
    [self.view addSubview:csharp]; 
    UIImage *buttonImage3 = [UIImage imageNamed:@"orange sharp.png"]; 
    [dsharp setImage:buttonImage3 forState:UIControlStateNormal]; 
    [self.view addSubview:dsharp]; 
    UIImage *buttonImage4 = [UIImage imageNamed:@"orange sharp.png"]; 
    [fsharp setImage:buttonImage4 forState:UIControlStateNormal]; 
    [self.view addSubview:fsharp]; 
    UIImage *buttonImage5 = [UIImage imageNamed:@"orange sharp.png"]; 
    [gsharp setImage:buttonImage5 forState:UIControlStateNormal]; 
    [self.view addSubview:gsharp]; 
    UIImage *buttonImage6 = [UIImage imageNamed:@"silver key.png"]; 
    [middlec setImage:buttonImage6 forState:UIControlStateNormal]; 
    [self.view addSubview:middlec]; 
    UIImage *buttonImage7 = [UIImage imageNamed:@"silver key.png"]; 
    [d setImage:buttonImage7 forState:UIControlStateNormal]; 
    [self.view addSubview:d]; 
    UIImage *buttonImage8 = [UIImage imageNamed:@"silver key.png"]; 
    [en setImage:buttonImage8 forState:UIControlStateNormal]; 
    [self.view addSubview:en]; 
    UIImage *buttonImage9 = [UIImage imageNamed:@"silver key.png"]; 
    [f setImage:buttonImage9 forState:UIControlStateNormal]; 
    [self.view addSubview:f]; 
    UIImage *buttonImage10 = [UIImage imageNamed:@"silver key.png"]; 
    [g setImage:buttonImage10 forState:UIControlStateNormal]; 
    [self.view addSubview:g]; 
    UIImage *buttonImage11 = [UIImage imageNamed:@"silver key.png"]; 
    [a setImage:buttonImage11 forState:UIControlStateNormal]; 
    [self.view addSubview:a]; 
    UIImage *buttonImage12 = [UIImage imageNamed:@"silver key.png"]; 
    [b setImage:buttonImage12 forState:UIControlStateNormal]; 
    [self.view addSubview:b]; 
} 

} 

Answer 1

私はちょうどこれにもぶつかりました。カスタムでない限り、ボタンの背景を変更することはできません。それ以外の場合は、通常のボタンの背景を変更するだけでUITableViewCellの背景を変更するようなものです（contentViewにアクセスしたときに実際の変化が起こる - しかし、それはUIButtonとケースではありません）

だからあなたのボタンタイプはCustomにインターフェースのビルドから変更したり、

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];