轉換潘UIGesture到滑動手勢

Question

當用戶在特定的細胞平移他們的手指，所述細胞根據用戶的x軸改變顏色。我將如何去改變從平移手勢到滑動。我想，這樣的替代平移，輕掃於細胞揭示其背後的顏色來構建它。當使用者舉起手指時，細胞應該回到原位。有小費嗎？

@synthesize _panRecognizer; 

- (id)initWithReuseIdentifier:(NSString *)reuseIdentifier 
{ 
if (self = [super initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier]) 
{ 
    NSInteger emoteY = floor((self.frame.size.height - 32)/2); 

    _panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(respondToPanGesture:)]; 
    [_panRecognizer setDelegate:self]; 
    [_panRecognizer setMinimumNumberOfTouches:1]; 
    [_panRecognizer setMaximumNumberOfTouches:1]; 
    [self addGestureRecognizer:_panRecognizer]; 

//  [[self textLabel] setFont:[UIFont boldSystemFontOfSize:18.0]]; 
    [[self textLabel] setFont:[UIFont systemFontOfSize:24.0]]; 
    [self setSelectionStyle:UITableViewCellSelectionStyleNone]; 

    _border = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, self.frame.size.height)]; 
    [self addSubview:_border]; 

    _rightEmote = [[UIImageView alloc] initWithFrame:CGRectMake(self.frame.size.width - 42, emoteY, 32, 32)]; 
    [self addSubview:_rightEmote]; 

    _leftEmote = [[UIImageView alloc] initWithFrame:CGRectMake(-32, emoteY, 32, 32)]; 
    [self addSubview:_leftEmote]; 
} 

return self; 
} 

- (void)setFrame:(CGRect)frame 
{ 
     [super setFrame:frame]; 

CGRect borderFrame = _border.frame, 
rightEmoteFrame = _rightEmote.frame, 
leftEmoteFrame = _leftEmote.frame; 

NSInteger emoteY = floor((self.frame.size.height - 32)/2); 

borderFrame.size.height = self.frame.size.height; 
rightEmoteFrame.origin.y = emoteY; 
leftEmoteFrame.origin.y = emoteY; 

[_border setFrame:borderFrame]; 
[_rightEmote setFrame:rightEmoteFrame]; 
[_leftEmote setFrame:leftEmoteFrame]; 
} 

- (DDFactor *)factor 
{ 
    return _factor; 
} 

- (void)setFactor:(DDFactor *)factor 
{ 
_factor = factor; 

}

- (void)respondToPanGesture:(UIGestureRecognizer *)recognizer 
{ 
// NSLog(@"%lu", [recognizer state]); 

NSInteger rstate = [recognizer state]; 
CGFloat touchX = 0.0; 

if ([recognizer numberOfTouches] == 1) 
{ 
    touchX = [recognizer locationOfTouch:0 inView:self].x; 

    if (rstate == UIGestureRecognizerStateBegan) 
    { 
     /* 
     animate to color under touch 
     */ 

     CGRect labelFrame = [self textLabel].frame; 
     labelFrame.origin.x += 42; 

     CGRect rightEmoteFrame = _rightEmote.frame; 
     rightEmoteFrame.origin.x += 42; 
     CGRect leftEmoteFrame = _leftEmote.frame; 
     leftEmoteFrame.origin.x += 42; 

     [UIView animateWithDuration:0.3 animations:^{ 
      [_border setAlpha:0.0]; 
      [[self textLabel] setTextColor:[UIColor whiteColor]]; 
      [[self textLabel] setFrame:labelFrame]; 
      [_rightEmote setFrame:rightEmoteFrame]; 
      [_leftEmote setFrame:leftEmoteFrame]; 
     }]; 
     [self animateEmoticonsWithColor:NO duration:0.3]; 
    } 
    else if (rstate == UIGestureRecognizerStateChanged) 
    { 
     /* 
     alter color 
     trigger emote animation if necessary 
     */ 

     if ([self responseForTouchPosition:touchX] != _responseValue) 
     { 
      [self setResponseValue:[self responseForTouchPosition:touchX]]; 
      [_border setBackgroundColor:[UIColor colorForResponse:_responseValue]]; 
      [self animateToBackgroundColor:[UIColor colorForResponse:_responseValue]]; 
      [self animateEmoticonsWithColor:NO duration:0.2]; 
     } 
    } 
} 
else if (([recognizer numberOfTouches] == 0) && (rstate == 3)) 
{ 
    CGRect labelFrame = [self textLabel].frame; 
    labelFrame.origin.x -= 42; 

    CGRect rightEmoteFrame = _rightEmote.frame; 
    rightEmoteFrame.origin.x -= 42; 
    CGRect leftEmoteFrame = _leftEmote.frame; 
    leftEmoteFrame.origin.x -= 42; 

    [UIView animateWithDuration:0.3 animations:^{ 
     [_border setAlpha:1.0]; 
     [_rightEmote setFrame:rightEmoteFrame]; 
     [_leftEmote setFrame:leftEmoteFrame]; 
     [[self textLabel] setFrame:labelFrame]; 
     [[self textLabel] setTextColor:[UIColor colorForResponse:_responseValue]]; 
     [self setBackgroundColor:[[UIColor colorForResponse:_responseValue] colorWithAlphaComponent:0.1]]; 
    }]; 
    [self animateEmoticonsWithColor:YES duration:0.3]; 
} 

}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated 
{ 
[super setSelected:selected animated:animated]; 

// Configure the view for the selected state 
} 

- (DDResponseValue)responseForTouchPosition:(CGFloat)x 
{ 
DDResponseValue response; 

if (x <= 70) response = DDResponseGrin; 
else if (x <= 120) response = DDResponseSmile; 
else if (x <= 170) response = DDResponseSad; 
else if (x <= 220) response = DDResponseNervous; 
else if (x <= 270) response = DDResponseRefusal; 
else response = DDResponseNeutral; 

return response; 
} 

Answer 1

您可以使用UISwipeGestureRecognizer狀態，並可以做你想做的。對下面的代碼一看，

- (void)swipeGestureMethod:(UISwipeGestureRecognizer *)recognizer { 

    CGPoint point = [recognizer locationInView:[recognizer view]]; 
    if (recognizer.state == UIGestureRecognizerStateBegan) { 

    } else if (recognizer.state == UIGestureRecognizerStateEnded) { 

    } 

}