Comment dessiner la bulle de texte comme UITextview ContentSize

Question

Je dessine la bulle de texte en utilisant UIBezierpath dans une classe UIView. Dans la classe view contient l'UITextView. J'utilise le code suivant pour dessiner la bulle.

//BezierPathView.h

@interface BezierpathView : UIView<UITextViewDelegate>{ 

CGFloat animatedDistance; 

UITextView *LXVolabel; 
UIView *view; 
UIBezierPath* speechBubbleTopPath; 
UIBezierPath* rectanglePath; 
UIBezierPath* speechBubbleBottomPath; 
UIColor* darkGray; 
UIColor* shadow; 
CGSize shadowOffset; 
CGFloat shadowBlurRadius; 
NSString* textContent; 
} 
@property(nonatomic,strong)UIView *view; 
@property(nonatomic,strong)UITextView *LXVolabel; 

//BezierPath.m

@implementation BezierpathView 
@synthesize LXVolabel,view; 
- (id)initWithFrame:(CGRect)frame{ 
self = [super initWithFrame:frame]; 
if (self) { 
    self.backgroundColor = [UIColor clearColor]; 
    self.LXVolabel = [[UITextView alloc]initWithFrame:CGRectMake(0, 0,self.frame.size.width , self.frame.size.height-10)]; 
    self.LXVolabel.backgroundColor = [UIColor clearColor]; 
    self.LXVolabel.delegate = self; 
    self.LXVolabel.font = [UIFont systemFontOfSize:20]; 

    [self addSubview:self.LXVolabel]; 

    CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame]; 
    view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, applicationFrame.size.width, applicationFrame.size.height)]; 


    // Color Declarations 
    darkGray = [UIColor grayColor]; 

    // Shadow Declarations 
    shadow= [UIColor blackColor]; 
    shadowOffset= CGSizeMake(0, 1); 
    shadowBlurRadius= 1; 

    // Abstracted Graphic Attributes 
    textContent= LXVolabel.text; 

} 
return self; 
} 
- (void)drawRect:(CGRect)rect 
{ 
[super drawRect:rect]; 
    CGContextRef context = UIGraphicsGetCurrentContext(); 

    // Drawing code 

//// General Declarations 

// speechBubbleTop Drawing 
speechBubbleTopPath = [UIBezierPath bezierPath]; 
[speechBubbleTopPath moveToPoint: CGPointMake(294, 7)]; 
[speechBubbleTopPath addCurveToPoint: CGPointMake(288, -0) controlPoint1: CGPointMake(294, 3.13) controlPoint2: CGPointMake(291.31, -0)]; 
[speechBubbleTopPath addLineToPoint: CGPointMake(8, -0)]; 
[speechBubbleTopPath addCurveToPoint: CGPointMake(2, 7) controlPoint1: CGPointMake(4.69, -0) controlPoint2: CGPointMake(2, 3.13)]; 
[speechBubbleTopPath addLineToPoint: CGPointMake(294, 7)]; 
[speechBubbleTopPath closePath]; 
[darkGray setFill]; 
[speechBubbleTopPath fill]; 



    // Rectangle Drawing 
    rectanglePath = [UIBezierPath bezierPathWithRect: CGRectMake(2, 6, 292,self.frame.size.height-15)]; 
CGContextSaveGState(context); 
CGContextSetShadowWithColor(context, shadowOffset, shadowBlurRadius, shadow.CGColor); 
[darkGray setFill]; 
[rectanglePath fill]; 
CGContextRestoreGState(context); 



// Text Drawing 
CGRect textRect = CGRectMake(7, 6, 292, self.frame.size.height-15); 
CGContextSaveGState(context); 
CGContextSetShadowWithColor(context, shadowOffset, shadowBlurRadius, shadow.CGColor); 
[[UIColor whiteColor] setFill]; 
[textContent drawInRect: textRect withFont: [UIFont fontWithName: @"Helvetica-Light" size: 14] lineBreakMode: NSLineBreakByWordWrapping alignment: NSTextAlignmentLeft]; 
//CGContextRestoreGState(context); 

float addedHeight = 100 -38; 

[self drawPath:addedHeight contextValue:context]; 
//speechBubbleBottom Drawing 


speechBubbleBottomPath = [UIBezierPath bezierPath]; 
[speechBubbleBottomPath moveToPoint: CGPointMake(2, 24+addedHeight)]; 
[speechBubbleBottomPath addCurveToPoint: CGPointMake(8, 30+addedHeight) controlPoint1: CGPointMake(2, 27.31+addedHeight) controlPoint2: CGPointMake(4.69, 30+addedHeight)]; 
[speechBubbleBottomPath addLineToPoint: CGPointMake(13, 30+addedHeight)]; 
[speechBubbleBottomPath addLineToPoint: CGPointMake(8, 42+addedHeight)]; 
[speechBubbleBottomPath addLineToPoint: CGPointMake(25, 30+addedHeight)]; 
[speechBubbleBottomPath addLineToPoint: CGPointMake(288, 30+addedHeight)]; 
[speechBubbleBottomPath addCurveToPoint: CGPointMake(294, 24+addedHeight) controlPoint1: CGPointMake(291.31, 30+addedHeight) controlPoint2: CGPointMake(294, 27.31+addedHeight)]; 
[speechBubbleBottomPath addLineToPoint: CGPointMake(2, 24+addedHeight)]; 
[speechBubbleBottomPath closePath]; 
CGContextSaveGState(context); 
CGContextSetShadowWithColor(context, shadowOffset, shadowBlurRadius, shadow.CGColor); 
[darkGray setFill]; 
[speechBubbleBottomPath fill]; 
CGContextRestoreGState(context); 

} 
-(void)textViewDidChange:(UITextView *)textView{ 
CGRect rect = textView.frame; 
rect.size.height = textView.contentSize.height;// Adding.size Since height is not a member of CGRect 
    self.frame = CGRectMake(10, 20, textView.frame.size.width, textView.contentSize.height+20); 
    textView.frame = rect; 
} 

Ma pensée est que lorsque je suis entré dans le texte dans la vue texte que je veux augmenter la taille des bulles de la parole basé sur le texte de la vue de texte. Mais ma taille de bulle de discours n'a pas augmenté correctement. Comment puis-je résoudre ce problème?

Answer 1

Etes-vous en train de déclencher le rafraîchissement lorsque le texte est modifié?

Dans la méthode textViewDidChange ajouter ...

[self setNeedsDisplay]; 

... comme la dernière ligne.

Cela déclenchera à nouveau la méthode drawRect.