如何水平設置彈出窗口的位置

Question

我正在製作一個應用程序，我正在使用滑塊並且改變滑塊的位置值也是滑動的，現在我卡住了，我想設置當我改變位置水平滑塊，然後我需要改變水平位置的popover位置。我附上屏幕截圖，好讓你的人更好的瞭解它，這是我的項目鏈接https://www.dropbox.com/s/n0fl34h6t8jlazn/CustomSlider.zip?dl=0，

下面

是1查看我的示例代碼和我改變我uislider類anpopoverslider：

-(void)constructSlider { 
    _popupView = [[ANPopoverView alloc] initWithFrame:CGRectZero]; 
    _popupView.backgroundColor = [UIColor clearColor]; 
    _popupView.alpha = 0.0; 
    [self addSubview:_popupView]; 
} 

以下是我的ANpopoverslider

#import "ANPopoverSlider.h" 

    @implementation ANPopoverSlider 

    - (id)initWithFrame:(CGRect)frame 
    { 
     self = [super initWithFrame:frame]; 
     if (self) { 
      // Initialization code 
      [self constructSlider]; 
     } 
     return self; 
    } 

    -(id)initWithCoder:(NSCoder *)aDecoder { 
     self = [super initWithCoder:aDecoder]; 
     if (self) { 
      [self constructSlider]; 
     } 
     return self; 
    } 

    #pragma mark - UIControl touch event tracking 
    -(BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event { 
     // Fade in and update the popup view 
     CGPoint touchPoint = [touch locationInView:self]; 

     // Check if the knob is touched. If so, show the popup view 
     if(CGRectContainsPoint(CGRectInset(self.thumbRect, -12.0, -12.0), touchPoint)) { 
      [self positionAndUpdatePopupView]; 
      [self fadePopupViewInAndOut:YES]; 
     } 

     return [super beginTrackingWithTouch:touch withEvent:event]; 
    } 

    -(BOOL)continueTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event { 
     // Update the popup view as slider knob is being moved 
     [self positionAndUpdatePopupView]; 
     return [super continueTrackingWithTouch:touch withEvent:event]; 
    } 

    -(void)cancelTrackingWithEvent:(UIEvent *)event { 
     [super cancelTrackingWithEvent:event]; 
    } 

    -(void)endTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event { 
     // Fade out the popup view 
     [self fadePopupViewInAndOut:NO]; 
     [super endTrackingWithTouch:touch withEvent:event]; 
    } 


    #pragma mark - Helper methods 
    -(void)constructSlider { 
     CGRect frame = CGRectMake(150, 230, 300.0, 10.0); 

     _popupView = [[ANPopoverView alloc] initWithFrame:frame]; 
     _popupView.backgroundColor = [UIColor clearColor]; 
     _popupView.alpha = 0.0; 
     [self addSubview:_popupView]; 
    } 

    -(void)fadePopupViewInAndOut:(BOOL)aFadeIn { 
     [UIView beginAnimations:nil context:NULL]; 
     [UIView setAnimationDuration:0.5]; 
     if (aFadeIn) { 
      _popupView.alpha = 1.0; 
     } else { 
      _popupView.alpha = 0.0; 
     } 
     [UIView commitAnimations]; 
    } 

    -(void)positionAndUpdatePopupView { 
     CGRect zeThumbRect = self.thumbRect; 
     CGRect popupRect = CGRectOffset(zeThumbRect, 0, -floor(zeThumbRect.size.height * 1.5)); 
     _popupView.frame = CGRectInset(popupRect, -20, -10); 
     _popupView.value = self.value; 
    } 


    #pragma mark - Property accessors 
    -(CGRect)thumbRect { 
     CGRect trackRect = [self trackRectForBounds:self.bounds]; 
     CGRect thumbR = [self thumbRectForBounds:self.bounds trackRect:trackRect value:self.value]; 
     return thumbR; 
    } 

    /* 
    // Only override drawRect: if you perform custom drawing. 
    // An empty implementation adversely affects performance during animation. 
    - (void)drawRect:(CGRect)rect 
    { 
     // Drawing code 
    } 
    */ 

    @end 

，這裏是我的酥料餅類

- (id)initWithFrame:(CGRect)frame 
{ 
    self = [super initWithFrame:frame]; 
    if (self) { 
     self.font = [UIFont boldSystemFontOfSize:15.0f]; 

     UIImageView *popoverView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"sliderlabel.png"]]; 
     [self addSubview:popoverView]; 

     textLabel = [[UILabel alloc] init]; 
     textLabel.backgroundColor = [UIColor clearColor]; 
     textLabel.font = self.font; 
     textLabel.textColor = [UIColor colorWithWhite:1.0f alpha:0.7]; 
     textLabel.text = self.text; 
     textLabel.textAlignment = NSTextAlignmentCenter; 
     textLabel.frame = CGRectMake(0, -2.0f, popoverView.frame.size.width, popoverView.frame.size.height); 
     [self addSubview:textLabel]; 

    } 
    return self; 
} 

-(void)setValue:(float)aValue { 
    _value = aValue; 
    self.text = [NSString stringWithFormat:@"%4.2f", _value]; 
    textLabel.text = self.text; 
    [self setNeedsDisplay]; 
} 

Answer 1

我嘗試了示例項目和工作與簡單的功能

@property (strong, nonatomic) IBOutlet UISlider *slider; // make the getter and setter for Slider 
@property (strong, nonatomic) IBOutlet UILabel *lblText; // make the getter and setter for label 



- (void)viewDidLoad { 
[super viewDidLoad]; 

// set verticical of UIslider 

CGAffineTransform trans = CGAffineTransformMakeRotation(M_PI * 0.5); 
self.slider.transform = trans; 

// get the events of UISlider 
[self.slider addTarget:self 
       action:@selector(sliderDidEndSliding:) 
    forControlEvents:(UIControlEventTouchUpInside | UIControlEventTouchUpOutside)]; 

} 
// this method used for hide the label after changed the value 
- (void)sliderDidEndSliding:(NSNotification *)notification { 
    NSLog(@"Slider did end sliding..."); 
    [self.lblText removeFromSuperview]; 
} 




// the slider value change method 
- (IBAction)slider:(UISlider*)sender 
{ 
// add the subview the lable to slider 
[self.slider addSubview:self.lblText]; 
self.lblText.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"sliderlabel.png"]]; 
self.lblText.text = [NSString stringWithFormat:@"%4.2f",sender.value]; 

// change the label position depend upon slider move 
self.lblText.center = CGPointMake(self.slider.value*self.slider.bounds.size.width,80); 
[self.lblText setTransform:CGAffineTransformMakeRotation(-M_PI/2)]; 

} 

這裏我重視的樣品項目UISlider下載link