UITextView - 単語が行の最後の単語であることを定義する方法

Question

私はTextViewを持っており、現在の単語と同じサイズと同じフォントで各単語の上にボタンを追加する必要があります。このコードは機能しますが、行に1つの単語がある場合などはありません。

.h 
@interface Text2ButtonsViewController : UIViewController { 

    UITextView *sourceText; 
} 
@property (nonatomic, retain) IBOutlet UITextView *sourceText; 

.m 

-(IBAction) processText { 

    for (UIView *button in [self.sourceText subviews]) { 
     if (button.tag == 33) 
      [button removeFromSuperview]; 
    } 

    NSString *sourceString = [NSString stringWithString:self.sourceText.text]; 

    NSArray *sourceArray = [sourceString componentsSeparatedByString:@" "]; 

    CGSize spaceSize = [@" " sizeWithFont:self.sourceText.font]; 

    float textPadding = 8.0f; 

    float stepX = textPadding; 
    float stepY = textPadding; 
    CGRect buttonFrame; 

    for (NSString *string in sourceArray) { 

    UIButton *actButton = [UIButton buttonWithType:UIButtonTypeCustom]; 

    actButton.backgroundColor = [[UIColor greenColor] colorWithAlphaComponent:0.5]; 

    [actButton setTitle:string forState:UIControlStateNormal]; 
    actButton.titleLabel.font = self.sourceText.font; 
    CGSize stringSize = [string sizeWithFont:self.sourceText.font]; 
    actButton.tag = 33; 
    //if summary width of all buttons and spaces are greater than 
    if (stepX + stringSize.width + textPadding > self.sourceText.frame.size.width) { 
     stepX = textPadding; 
     stepY = stepY + stringSize.height; 
    } 
    buttonFrame = CGRectMake(stepX, stepY, stringSize.width, stringSize.height); 

    stepX = stepX + stringSize.width + spaceSize.width; 
    actButton.frame = buttonFrame; 

    [self.sourceText addSubview:actButton]; 

    } 

} 

単語がUITextViewの行の最後のものであることを定義する方法はありますか？

Answer 1

ここで簡単な条件を確認する必要があります。

NSArray *sourceArray = [sourceString componentsSeparatedByString:@" "]; 

if ([sourceArray count] == 0 && [sourceString length] != 0) { 

    sourceArray = [NSArray arrayWithObject:sourceString]; 
} 

編集：

TextViewには、ホワイトスペースと改行文字の両方が含まれます。したがって、componentsSeparatedByCharactersInSet:メソッドを使用してテキストを区切ることができます。ちょうど使用、

NSArray *sourceArray = [sourceString componentsSeparatedByCharactersInSet:[NSCharacterSet whiteSpaceAndNewLineCharacterSet]]; 

私はこれがうまくいけばいいです。

Answer 2

このコードは私のために

@interface DetailViewController : UIViewController { 

    UITextView *sourceText; 
    UIView *buttonHolder; 
} 

@implementation DetailViewController 

- (IBAction) processText { 

    self.buttonHolder.hidden = NO; 

    self.sourceText.editable = NO; 

    self.buttonHolder.frame = CGRectMake(0.0f, 0.0f, self.sourceText.contentSize.width, self.sourceText.contentSize.height); 

    NSLog(@"self.buttonholder.frame = %@", NSStringFromCGRect (self.buttonHolder.frame)); 

    if ([[self.buttonHolder subviews] count] !=0) { 
     for (UIView *button in [self.buttonHolder subviews]) 
      [button removeFromSuperview]; 

    } 

    CGSize spaceSize = [@" " sizeWithFont:self.sourceText.font]; 

    float textPadding = 8.0f; 

    float stepX = textPadding; 
    float stepY = textPadding; 
    CGRect buttonFrame; 
    CGSize wordSize; 
    NSString *sourceString = [NSString stringWithString:self.sourceText.text]; 

    float lineHeight = [sourceString sizeWithFont:self.sourceText.font].height; 

    NSArray *linesArray = [sourceString componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]]; 

    for (NSString *line in linesArray) { 

     NSArray *wordsInLine = [line componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]; 

     for (NSString *word in wordsInLine) { 

      UIButton *actButton = [UIButton buttonWithType:UIButtonTypeCustom]; 

      actButton.backgroundColor = [[UIColor greenColor] colorWithAlphaComponent:0.5]; 

      [actButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 

      [actButton setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted]; 

      [actButton setTitle:word forState:UIControlStateNormal]; 

      [actButton addTarget:self action:@selector(workWithWord:) forControlEvents:UIControlEventTouchUpInside]; 

      actButton.titleLabel.font = self.sourceText.font; 

      wordSize = [word sizeWithFont:self.sourceText.font]; 
      actButton.tag = 33; 

      if (stepX + wordSize.width + textPadding > self.sourceText.frame.size.width) { 
       stepX = textPadding; 
       stepY = stepY + lineHeight; 
      } 

      buttonFrame = CGRectMake(stepX, stepY, wordSize.width, lineHeight-lineHeight/10.0); 
      actButton.frame = buttonFrame; 

      stepX = stepX + wordSize.width + spaceSize.width; 

      [self.buttonHolder addSubview:actButton]; 

     } 

     stepX = textPadding; 
     stepY = stepY + lineHeight; 

    } 

}