UITextViewタッチイベントを処理するときに単語をタッチする

Question

私は段落を表示するUITextViewを持っています。たとえば：[self aFunction:@"This"]

は取り扱いのための任意のアイデアがありますように「この」として

self.myTextView.text = @"This is a sample paragraph" 

私はこの段落で単語をタッチすると私が今やりたいことはある、関数が呼び出しになりますこのイベントとパラメータを取得する方法は、ユーザという言葉に触れています。たぶん、段落を表示するには別の方法が必要ですが、UITextViewではありません。次の例では

Answer 1

使用（UITextView）

私は私がインセット値を設定することができるシンプルなUILabelサブクラスを作成しました：

#import "WWLabel.h" 

#define WWLabelDefaultInset 5 

@implementation WWLabel 

@synthesize topInset, leftInset, bottomInset, rightInset; 

- (id)initWithFrame:(CGRect)frame 
{ 
    self = [super initWithFrame:frame]; 
    if (self) { 
     self.topInset = WWLabelDefaultInset; 
     self.bottomInset = WWLabelDefaultInset; 
     self.rightInset = WWLabelDefaultInset; 
     self.leftInset = WWLabelDefaultInset; 
    } 
    return self; 
} 

- (void)drawTextInRect:(CGRect)rect 
{ 
    UIEdgeInsets insets = {self.topInset, self.leftInset, 
     self.bottomInset, self.rightInset}; 

    return [super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)]; 
} 

は、その後、私は私のカスタムラベルを含まUIViewのサブクラスを作成しましたタブ上では、タップ位置のサイズを超えるまで、ラベル内の各単語のテキストのサイズを作成しました。これがタップされた単語です。それは支配者ではありませんが、現在は十分に機能しています。

私は、テキストをハイライト表示するシンプルなNSAttributedStringを使用：

#import "WWPhoneticTextView.h" 
#import "WWLabel.h" 

#define WWPhoneticTextViewInset 5 
#define WWPhoneticTextViewDefaultColor [UIColor blackColor] 
#define WWPhoneticTextViewHighlightColor [UIColor yellowColor] 

#define UILabelMagicTopMargin 5 
#define UILabelMagicLeftMargin -5 

@implementation WWPhoneticTextView { 
    WWLabel *label; 
    NSMutableAttributedString *labelText; 
    NSRange tappedRange; 
} 

// ... skipped init methods, very simple, just call through to configureView 

- (void)configureView 
{ 
    if(!label) { 
     tappedRange.location = NSNotFound; 
     tappedRange.length = 0; 

     label = [[WWLabel alloc] initWithFrame:[self bounds]]; 
     [label setLineBreakMode:NSLineBreakByWordWrapping]; 
     [label setNumberOfLines:0]; 
     [label setBackgroundColor:[UIColor clearColor]]; 
     [label setTopInset:WWPhoneticTextViewInset]; 
     [label setLeftInset:WWPhoneticTextViewInset]; 
     [label setBottomInset:WWPhoneticTextViewInset]; 
     [label setRightInset:WWPhoneticTextViewInset]; 

     [self addSubview:label]; 
    } 


    // Setup tap handling 
    UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc] 
               initWithTarget:self action:@selector(handleSingleTap:)]; 
    singleFingerTap.numberOfTapsRequired = 1; 
    [self addGestureRecognizer:singleFingerTap]; 
} 

- (void)setText:(NSString *)text 
{ 
    labelText = [[NSMutableAttributedString alloc] initWithString:text]; 
    [label setAttributedText:labelText]; 
} 

- (void)handleSingleTap:(UITapGestureRecognizer *)sender 
{ 
    if (sender.state == UIGestureRecognizerStateEnded) 
    { 
     // Get the location of the tap, and normalise for the text view (no margins) 
     CGPoint tapPoint = [sender locationInView:sender.view]; 
     tapPoint.x = tapPoint.x - WWPhoneticTextViewInset - UILabelMagicLeftMargin; 
     tapPoint.y = tapPoint.y - WWPhoneticTextViewInset - UILabelMagicTopMargin; 

     // Iterate over each word, and check if the word contains the tap point in the correct line 
     __block NSString *partialString = @""; 
     __block NSString *lineString = @""; 
     __block int currentLineHeight = label.font.pointSize; 
     [label.text enumerateSubstringsInRange:NSMakeRange(0, [label.text length]) options:NSStringEnumerationByWords usingBlock:^(NSString* word, NSRange wordRange, NSRange enclosingRange, BOOL* stop){ 

      CGSize sizeForText = CGSizeMake(label.frame.size.width-2*WWPhoneticTextViewInset, label.frame.size.height-2*WWPhoneticTextViewInset); 
      partialString = [NSString stringWithFormat:@"%@ %@", partialString, word]; 

      // Find the size of the partial string, and stop if we've hit the word 
      CGSize partialStringSize = [partialString sizeWithFont:label.font constrainedToSize:sizeForText lineBreakMode:label.lineBreakMode]; 

      if (partialStringSize.height > currentLineHeight) { 
       // Text wrapped to new line 
       currentLineHeight = partialStringSize.height; 
       lineString = @""; 
      } 
      lineString = [NSString stringWithFormat:@"%@ %@", lineString, word]; 

      CGSize lineStringSize = [lineString sizeWithFont:label.font constrainedToSize:label.frame.size lineBreakMode:label.lineBreakMode]; 
      lineStringSize.width = lineStringSize.width + WWPhoneticTextViewInset; 

      if (tapPoint.x < lineStringSize.width && tapPoint.y > (partialStringSize.height-label.font.pointSize) && tapPoint.y < partialStringSize.height) { 
       NSLog(@"Tapped word %@", word); 
       if (tappedRange.location != NSNotFound) { 
        [labelText addAttribute:NSForegroundColorAttributeName value:[UIColor blackColor] range:tappedRange]; 
       } 

       tappedRange = wordRange; 
       [labelText addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:tappedRange]; 
       [label setAttributedText:labelText]; 
       *stop = YES; 
      } 
     }];   
    } 
}