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ios Horizontal UISlider导致UIPageViewController在不打算时滑动页面

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网页浏览中的单个或多个水平滑块会带来麻烦 . 用户滑动滑块的拇指而不会导致页面视图滑动 .

我尝试过的变通方法

  • 重写Pan Gesture以使最小速度相关

  • 在滑块上放置一个不可见的矩形来捕捉平移手势

  • 重写HitTest以使拇指点击矩形更大

1 回答

  • 5

    到目前为止,最好的结果是在自定义扩展UISlider类中覆盖了Pan Gesture . 会发生什么是在UISlider矩形中的任何地方检测到Pan Gesture而不仅仅是拇指 . 现在坚如磐石,没有翻页浏览 .

    注意:提供了initWithFrame和initWithCoder,因此可以通过代码或通过XIB实例化sictSlider2 .

    如果用户点击滑块矩形内部,也会处理Tap . 潘也有

    [self sendActionsForControlEvents:UIControlEventValueChanged];
    

    因为ValueChanged事件仅在拇指移动时发生,并且当Pan处理程序接管时拇指在一点距离后停止移动 .

    Happy CutAndPaste!

    码:

    #import "sictSlider2.h"
    
    @implementation sictSlider2
    
    - (id)initWithFrame:(CGRect)frame
    {
        self = [super initWithFrame:frame];
        if (self) {
    
    
            UIPanGestureRecognizer * recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
            recognizer.delegate = self;
            [self addGestureRecognizer:recognizer];
    
            UITapGestureRecognizer * recognizer2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
            recognizer2.delegate = self;
            [self addGestureRecognizer:recognizer2];
    
            UIPinchGestureRecognizer * recognizer3 = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)];
            recognizer3.delegate = self;
            [self addGestureRecognizer:recognizer3];
    
            UISwipeGestureRecognizer * recognizer4 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];
            recognizer4.delegate = self;
            [self addGestureRecognizer:recognizer4];
    
            self.backgroundColor = [UIColor clearColor];   
        }
        return self;
    }
    
    
    - (id)initWithCoder:(NSCoder *)aDecoder
    {
        self = [super initWithCoder:aDecoder];
        if (self) {
    
            UIPanGestureRecognizer * recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
            recognizer.delegate = self;
            [self addGestureRecognizer:recognizer];
    
            UITapGestureRecognizer * recognizer2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
            recognizer2.delegate = self;
            [self addGestureRecognizer:recognizer2];
    
            UIPinchGestureRecognizer * recognizer3 = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)];
            recognizer3.delegate = self;
            [self addGestureRecognizer:recognizer3];
    
            UISwipeGestureRecognizer * recognizer4 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];
            recognizer4.delegate = self;
            [self addGestureRecognizer:recognizer4];
    
            self.backgroundColor = [UIColor clearColor];     
        }
        return self;
    }
    
    
    - (void)handleTap:(UITapGestureRecognizer *)recognizer{
    
        CGPoint p = [recognizer locationInView:recognizer.view];    
        NSLog (@"in slider tap %f %f ", p.x, p.y);
    
        float val = self.value;  // current slider value
        // t.x is in coords of the slider rect, so divide by width to get delta
    
        val = p.x/self.frame.size.width;
        [self setValue:val];
        [self setNeedsDisplay];
    
    }
    - (void)handlePan:(UIPanGestureRecognizer *)recognizer {
    
        CGPoint t = [recognizer translationInView:recognizer.view];
        NSLog(@"in slider pan %f %f", t.x, t.y);
    
        float val = self.value;  // current slider value
        // t.x is in coords of the slider rect, so divide by width to get delta
    
        val = val + t.x/self.frame.size.width;
    
        [self sendActionsForControlEvents:UIControlEventValueChanged];
        [self setValue:val];
        [self setNeedsDisplay];
        [recognizer setTranslation:CGPointMake(0, 0) inView:recognizer.view];   
    }
    
    - (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer{
          NSLog(@"slider SWIPE");}
    @end
    

    和.h

    #import <UIKit/UIKit.h>
    
    @interface sictSlider2 : UISlider
    - (void)handleTap:(UITapGestureRecognizer *)recognizer;
    - (void)handlePan:(UIPanGestureRecognizer *)recognizer;
    - (void)handlePinch:(UIPinchGestureRecognizer *)recognizer;
    - (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer;
    @end
    

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