Ios 如何使用多点触摸正确显示两幅图像的高光？

我对自定义双滑块有问题。有两个图像是拇指。应用程序工作正常，两个拇指都可以用两个手指移动，但突出显示有问题

当我从一个拇指上取下手指时，从第二个拇指上突出显示的也会恢复正常。当我使用任何

if

和

else

station时，它会带来另一个不好的结果：当手指从图像中移出时，有时会高亮显示not changes或停留。或者眨眼

我不知道如何继续工作，用EndTouchs事件正确绑定突出显示。若未按下，则不突出显示拇指。如何解决

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

   for(UITouch *touch in [event allTouches]) {

       CGPoint touchPoint = [touch locationInView:self];
       if(CGRectContainsPoint(thumbLeft.frame, touchPoint)){
           thumbLeft.highlighted = YES;
       }
       if(CGRectContainsPoint(thumbRight.frame, touchPoint)){
           thumbRight.highlighted = YES;
       }

    }
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

    //No idea here
    for(UITouch *touch in [event allTouches]) {
        CGPoint touchPoint = [touch locationInView:self];


        //----------- ???? ----------//

        thumbRight.highlighted = NO;
        thumbLeft.highlighted = NO;

    }
}

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

    for(UITouch *touch in [event allTouches]) {

        CGPoint touchPoint = [touch locationInView:self];
        if (CGRectContainsPoint(thumbLeft.frame, touchPoint)){
            thumbLeft.center = CGPointMake(MAX(barLeftHorizontalPosition, MIN(touchPoint.x, thumbRight.center.x - minimumRange)), thumbLeft.center.y);
            thumbLeft.highlighted = YES;
            valueLeft = [self valueGetX:thumbLeft.center.x];
        }

        if (CGRectContainsPoint(thumbRight.frame, touchPoint)){
            thumbRight.center = CGPointMake(MAX(thumbLeft.center.x + minimumRange, MIN(touchPoint.x, barRightHorizontalPosition)), thumbRight.center.y);
            thumbRight.highlighted = YES;
            valueRight = [self valueGetX:thumbRight.center.x];
        }

        [self sendActionsForControlEvents:UIControlEventValueChanged];
    }
}

---

我认为问题不在于

touchesend

，而在于

touchesMoved

方法

您应该将逻辑重新实现到touchesEnded中：

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    for(UITouch *touch in [event allTouches]) {
        CGPoint touchPoint = [touch locationInView:self];
        if(CGRectContainsPoint(thumbLeft.frame, touchPoint)){
            thumbLeft.highlighted = NO;
        }
        if(CGRectContainsPoint(thumbRight.frame, touchPoint)){
            thumbRight.highlighted = NO;
        }
    }
}

并在突出显示处设置

触摸移动
手柄设置否：

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    for(UITouch *touch in [event allTouches]) {
        CGPoint touchPoint = [touch locationInView:self];

        if (CGRectContainsPoint(thumbLeft.frame, touchPoint)){
            thumbLeft.center = CGPointMake(MAX(barLeftHorizontalPosition, MIN(touchPoint.x, thumbRight.center.x - minimumRange)), thumbLeft.center.y);
            thumbLeft.highlighted = YES;
            valueLeft = [self valueGetX:thumbLeft.center.x];
        } else {
            thumbLeft.highlighted = NO;
        }

        if (CGRectContainsPoint(thumbRight.frame, touchPoint)){
            thumbRight.center = CGPointMake(MAX(thumbLeft.center.x + minimumRange, MIN(touchPoint.x, barRightHorizontalPosition)), thumbRight.center.y);
            thumbRight.highlighted = YES;
            valueRight = [self valueGetX:thumbRight.center.x];
        } else {
            thumbRight.highlighted = NO;
        }

        [self sendActionsForControlEvents:UIControlEventValueChanged];
    }
}