Come disegnare il fumetto come UITextview ContentSize

Question

Disegno il fumetto con UIBezierpath in una classe UIView. Nella classe di visualizzazione contiene UITextView. Sto usando il seguente codice per disegnare il fumetto.

//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; 
} 

Il mio pensiero è che quando ho inserito il testo nella visualizzazione di testo che voglio aumentare la dimensione della bolla di discorso in base al testo della visualizzazione del testo. Ma le dimensioni del fumetto non aumentano correttamente. Come posso risolvere questo problema?

Answer 1

Stai attivando il ridisegno quando il testo viene modificato?

Nel metodo textViewDidChange aggiungere ...

[self setNeedsDisplay]; 

... come l'ultima riga.

Ciò attiverà nuovamente il metodo drawRect.