UILabel Category 計算UILabel內容大小

 
 
 
 

  
  
  
  
  
  
  
  
   
   
   
   

    
    
    
    UILabel+ContentSize.h
   
   
   
   
   
   
   
   

    
    
    
    
    
    
    
    
     
     
     
     

      
      
      
      #import <UIKit/UIKit.h>
     
     
     
     
     
     
     
     

      
      
      
       
     
     
     
     
     
     
     
     

      
      
      
      @interface UILabel (ContentSize)
     
     
     
     
     
     
     
     

      
      
      
       
     
     
     
     
     
     
     
     

      
      
      
      - (CGSize)contentSize;
     
     
     
     
     
     
     
     

      
      
      
       
     
     
     
     
     
     
     
     

      
      
      
      @end
     
     
     
     
    
    
    
    

   
   
   
   
 
 
 
 
 
 
 
 

  
  
  
  UILabel+ContentSize.m

 
 
 
 
 
 
 
 

  
  
  
  #import "UILabel+ContentSize.h"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

  
  
  
  @implementation 
  
  
  
  UILabel 
  
  
  
  (ContentSize)
 
 
 
 
 
 
 
 

  
  
  
   
 
 
 
 
 
 
 
 

  
  
  
  - 
  
  
  
  (
  
  
  
  CGSize
  
  
  
  )
  
  
  
  contentSize 
  
  
  
  {
 
 
 
 
 
 
 
 
   
  
  
  
  NSMutableParagraphStyle 
  
  
  
  * 
  
  
  
  paragraphStyle 
  
  
  
  = 
  
  
  
  [[
  
  
  
  NSMutableParagraphStyle 
  
  
  
  alloc
  
  
  
  ] 
  
  
  
  init
  
  
  
  ];
 
 
 
 
 
 
 
 
    
  
  
  
  paragraphStyle
  
  
  
  .
  
  
  
  lineBreakMode 
  
  
  
  = 
  
  
  
  self
  
  
  
  .
  
  
  
  lineBreakMode
  
  
  
  ;
 
 
 
 
 
 
 
 
    
  
  
  
  paragraphStyle
  
  
  
  .
  
  
  
  alignment 
  
  
  
  = 
  
  
  
  self
  
  
  
  .
  
  
  
  textAlignment
  
  
  
  ;
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
    
  
  
  
  NSDictionary 
  
  
  
  * 
  
  
  
  attributes 
  
  
  
  = 
  
  
  
  @{
  
  
  
  NSFontAttributeName 
  
  
  
  : 
  
  
  
  self
  
  
  
  .
  
  
  
  font
  
  
  
  ,
 
 
 
 
 
 
 
 
                                  
  
  
  
  NSParagraphStyleAttributeName 
  
  
  
  : 
  
  
  
  paragraphStyle
  
  
  
  };
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
    
  
  
  
  CGSize 
  
  
  
  contentSize 
  
  
  
  = 
  
  
  
  [
  
  
  
  self
  
  
  
  .
  
  
  
  text 
  
  
  
  boundingRectWithSize
  
  
  
  :
  
  
  
  self
  
  
  
  .
  
  
  
  frame
  
  
  
  .
  
  
  
  size
 
 
 
 
 
 
 
 
                                              
  
  
  
  options:
  
  
  
  (
  
  
  
  NSStringDrawingUsesLineFragmentOrigin
  
  
  
  |
  
  
  
  NSStringDrawingUsesFontLeading
  
  
  
  )
 
 
 
 
 
 
 
 
                                           
  
  
  
  attributes:
  
  
  
  attributes
 
 
 
 
 
 
 
 
                                              
  
  
  
  context:
  
  
  
  nil
  
  
  
  ].
  
  
  
  size
  
  
  
  ;
 
 
 
 
 
 
 
 
    
  
  
  
  return 
  
  
  
  contentSize
  
  
  
  ;
 
 
 
 
 
 
 
 

  
  
  
  }