Ios 单击下一步按钮时清除触摸屏uiimageview

如何删除填充颜色

我的代码：

- (void)viewDidLoad {
    [super viewDidLoad];
    alphabetsStoreArray = [[NSMutableArray alloc]initWithObjects:
        @"write a.png", @"write b.png", @"write c.png",
        @"write d.png", @"write e.png", @"write f.png", 
        @"write g.png", @"write h.png", @"write i.png",
        @"write j.png", @"write k.png", @"write l.png",
        @"write m.png", @"write n.png", @"write o.png",
        @"write p.png", @"write q.png", @"write r.png",
        @"write s.png", @"write t.png", @"write u.png",
        @"write v.png", @"write w.png", @"write x.png",
        @"write y.png", @"write z.png", nil];

    _homePopupView.hidden=true;

    [self names];
}

-(void)names{
     _voice = @"en-US";
    _speed = .25f;
    if(count>= alphabetsStoreArray.count)
    {
        printf("%d", count);
        NSLog(@"finished");
        [_alphabetChangeImageView removeFromSuperview];
        [_alphabetBackgroundImageView removeFromSuperview];
    }

    else if(count<alphabetsStoreArray.count||count<-1)
    {
        items = [[alphabetsStoreArray objectAtIndex:count] componentsSeparatedByString:@"."];

        NSString *tempString = [items objectAtIndex:0];
        NSArray *tempArray = [tempString componentsSeparatedByString:@" "];
        speechString1 = [tempArray objectAtIndex:1];

        if ([_synthesizer isPaused]) {
            [_synthesizer continueSpeaking];
        }

        else{
            [self speakText:speechString1];
              [self textToSpeechAction:alphabetsStoreArray :count :_alphabetBackgroundImageView  :_alphabetChangeImageView :isMicPresent];


        }
    }
}

-(void)textToSpeechAction:(NSMutableArray *)imageStoreArray :(int)counter :(UIImageView *)imageChangeImageView :(UIImageView *)spekerOrMic :(BOOL)isMicPresent
{
    _alphabetChangeImageView.image = [UIImage imageNamed:[imageStoreArray objectAtIndex:counter]];
}

- (void)speakText:(NSString*)text{
    if(_synthesizer == nil)
        _synthesizer = [[AVSpeechSynthesizer alloc] init];
    _synthesizer.delegate = self;

    AVSpeechUtterance *utterence = [[AVSpeechUtterance alloc] initWithString:text];
    utterence.rate = _speed;

    AVSpeechSynthesisVoice *voice = [AVSpeechSynthesisVoice voiceWithLanguage:_voice];
    [utterence setVoice:voice];

    [_synthesizer speakUtterance:utterence];
}

- (void) touchesBegan:(NSSet *) touches withEvent:(UIEvent *) event

{
    // Initialize a new path for the user gesture
    UITouch *touch = [[event allTouches] anyObject];

    CGPoint location = [touch locationInView:_alphabetBackgroundImageView];

    if((location.x > 50 && location.x < _alphabetBackgroundImageView.frame.size.width-50) && (location.y > 50 && location.y < _alphabetBackgroundImageView.frame.size.height-50))

    {
       lineImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];
        lineImageView.center = location;
        lineImageView.backgroundColor = selectedColor;
        [_alphabetBackgroundImageView addSubview:lineImageView];
    }
}

- (void) touchesMoved:(NSSet *) touches withEvent:(UIEvent *) event

{
    // Add new points to the path
    UITouch *touch = [[event allTouches] anyObject];

    CGPoint location = [touch locationInView:_alphabetBackgroundImageView];

    if((location.x > 50 && location.x <_alphabetBackgroundImageView.frame.size.width-50) && (location.y > 50 && location.y < _alphabetBackgroundImageView.frame.size.height-50))

    {
       lineImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];

        lineImageView.center = location;
        lineImageView.backgroundColor = selectedColor;
        [_alphabetBackgroundImageView addSubview:lineImageView];
    }
}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSSet* touchesForTargetView = [event touchesForView:self.alphabetBackgroundImageView];

    if (touchesForTargetView.allObjects.count != 0) {
        NSLog(@"yes");
        // touch was at target view
    }
    else {
        NSLog(@"no");
        // touch  was somewhere else
    }
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance{
    [self buttonoperation];
    _next.enabled = YES;
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance{

    // Enable/Disable buttons accordingly
    [self buttonoperation];

    _retry.enabled = NO;
    count +=1;
    [self names];
}

- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance{

    // Get the text
    NSString *text = [utterance speechString];

    // apply attribute
    NSMutableAttributedString * all = [[NSMutableAttributedString alloc] initWithString:text];
    [all addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:characterRange];

    // set the attributed text to textView
    [_tvTextToSpeak setAttributedText:all];
}

- (IBAction)nextAction:(id)sender {
    if ([_synthesizer isSpeaking]) {
        [_synthesizer stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];
        [self buttonoperation];
        _next.enabled = NO;
        [_tvTextToSpeak setText:speechString1];
    }
    count++;
    [self names];
}

-（void）viewDidLoad{
[超级视图下载]；
alphabetsStoreArray=[[NSMutableArray alloc]initWithObjects:
@“write a.png”、@“write b.png”、@“write c.png”，
@“写入d.png”、“写入e.png”、“写入f.png”，
@“写入g.png”、“写入h.png”、“写入i.png”，
@“write j.png”、@“write k.png”、@“write l.png”，
@“写入m.png”、@“写入n.png”、@“写入o.png”，
@“write p.png”、@“write q.png”、@“write r.png”，
@“写入s.png”、“写入t.png”、“写入u.png”，
@“write v.png”、@“write w.png”、@“write x.png”，
@“write y.png”，@“write z.png”，nil]；
_homePopupView.hidden=true；
[姓名]；
}
-（无效）姓名{
_语音=@“en-US”；
_速度=.25华氏度；
如果（计数>=alphabetsStoreArray.count）
{
printf（“%d”，计数）；
NSLog（@“完成”）；
[_alphabetChangeImageView从SuperView移除]；
[_alphabetBackgroundImageView从SuperView移除]；
}
否则如果（计数50&&location.y<\u alphabetBackgroundImageView.frame.size.height-50））
{
lineImageView=[[UIImageView alloc]initWithFrame:CGRectMake（0，0，100，100）]；
lineImageView.center=位置；
lineImageView.backgroundColor=所选颜色；
[\u alphabetBackgroundImageView添加子视图：lineImageView]；
}
}
-（无效）触摸移动：（NSSet*）触摸事件：（UIEvent*）事件
{
//向路径添加新点
UITouch*touch=[[event AllTouchs]anyObject]；
CGPoint位置=[触摸位置视图：_alphabetBackgroundImageView]；
if（（location.x>50&&location.x 50&&location.y<\u alphabetBackgroundImageView.frame.size.height-50））
{
lineImageView=[[UIImageView alloc]initWithFrame:CGRectMake（0，0，100，100）]；
lineImageView.center=位置；
lineImageView.backgroundColor=所选颜色；
[\u alphabetBackgroundImageView添加子视图：lineImageView]；
}
}
-（void）touchesend:（NSSet*）toucheevent:（UIEvent*）event
{
NSSet*touchesForTargetView=[事件touchesForView:self.alphabetBackgroundImageView]；
if（touchesForTargetView.allObjects.count！=0）{
NSLog（@“是”）；
//触摸是在目标视图
}
否则{
NSLog（@“否”）；
//触摸是在别的地方
}
}
-（void）speechSynthesizer:（AVSpeechSynthesizer*）合成器didStartSpeechUtterance:（AVSpeechUtterance*）话语{
[自动按钮操作]；
_next.enabled=是；
}
-（void）speechSynthesizer:（AVSpeechSynthesizer*）合成器didCancelspeechoutrance:（avspeechoutrance*）话语{
//相应地启用/禁用按钮
[自动按钮操作]；
_retry.enabled=否；
计数+=1；
[姓名]；
}
-（void）speechSynthesizer:（AVSpeechSynthesizer*）合成器将SpeakRangeofSpeechString:（NSRange）characterRange话语：（avSpeechOutrance*）话语{
//获取文本
NSString*text=[话语speechString]；
//应用属性
NSMutableAttributedString*all=[[NSMutableAttributedString alloc]initWithString:text]；
[所有addAttribute:NSForegroundColorAttributeName值：[UIColor redColor]范围：characterRange]；
//将属性文本设置为textView
[[U tvTextToSpeak setAttributedText:all]；
}
-（iAction）nextAction:（id）发送方{
如果（[[u合成器正在峰值]）{
[_合成器停止语音边界：AVSpeechBoundaryImmediate]；
[自动按钮操作]；
_next.enabled=否；
[u tvtextospeak setText:speechString1]；
}
计数++；
[姓名]；
}

这里我有两个imageview 1.aplhabetbackground 2.alphabetchangingbackground

因此，根据我的代码，当“下一步”按钮单击字母表存储阵列中的第二个数据时，其图像将显示在imageview中。点击“下一步”按钮，它会显示下一张图片，等等

这里我在字母表背景中使用了触摸事件。所以当图像显示时，我可以在屏幕上触摸并填充选定的颜色

---

但我需要在单击下一步按钮时，将填充的颜色从中删除。如何执行

如何清除子视图触摸图像视图如何可以查看

lineImageView=[[UIImageView alloc]initWithFrame:CGRectMake（0，0，100，100）]你每次都在创建一个新实例？我想它应该是一个全局变量，并且只初始化一次。Well
lineImageView.backgroundColor=[UIColor clearColor]将删除其颜色。