IOS uilabel settings Align, center, align

Source: Internet
Author: User
Tags uikit

In iOS, the default Uilabel text in the vertical direction can only center alignment, Bo Master to participate in foreign sites. Inherits a new class from the Uilabel, realizes the alignment, the center aligns, the bottom aligns. Details such as the following:

[CPP]View Plaincopy
  1. //   
  2. //MyUILabel.h   
  3. //     
  4. //   
  5. //Created by yexiaozi_007 on 3/4/13.   
  6. //Copyright (c) yexiaozi_007. All rights reserved.   
  7. //   
  8. #import <UIKit/UIKit.h>   
  9. typedef enum
  10. {
  11. Verticalalignmenttop = 0, //default
  12. Verticalalignmentmiddle,
  13. Verticalalignmentbottom,
  14. } VerticalAlignment;
  15. @interface Myuilabel:uilabel
  16. {
  17. @Private
  18. VerticalAlignment _verticalalignment;
  19. }
  20. @property (nonatomic) VerticalAlignment verticalalignment;
  21. @end

[CPP]View Plaincopy
  1. //   
  2. //MYUILABEL.M   
  3. //     
  4. //   
  5. //Created by yexiaozi_007 on 3/4/13.   
  6. //Copyright (c) yexiaozi_007. All rights reserved.   
  7. //   
  8. #import "MyUILabel.h"   
  9. @implementation Myuilabel
  10. @synthesize verticalalignment = Verticalalignment_;
  11. -(ID) initWithFrame: (CGRect) Frame {
  12. if (self = [Super Initwithframe:frame]) {
  13. Self.verticalalignment = Verticalalignmentmiddle;
  14. }
  15. return  Self ;
  16. }
  17. -(void) setverticalalignment: (verticalalignment) VerticalAlignment {
  18. Verticalalignment_ = VerticalAlignment;
  19. [Self setneedsdisplay];
  20. }
  21. -(CGRect) Textrectforbounds: (cgrect) Bounds Limitedtonumberoflines: (Nsinteger) NumberOfLines {
  22. CGRect textrect = [Super Textrectforbounds:bounds limitedtonumberoflines:numberoflines];
  23. Switch (self.verticalalignment) {
  24. Case Verticalalignmenttop:
  25. TEXTRECT.ORIGIN.Y = BOUNDS.ORIGIN.Y;
  26. Break  ;
  27. Case Verticalalignmentbottom:
  28. TEXTRECT.ORIGIN.Y = Bounds.origin.y + bounds.size.height-textrect.size.height;
  29. Break  ;
  30. Case Verticalalignmentmiddle:
  31. //Fall through.   
  32. default :  
  33. TEXTRECT.ORIGIN.Y = Bounds.origin.y + (bounds.size.height-textrect.size.height)/2.0;
  34. }
  35. return  Textrect;
  36. }
  37. -(void) Drawtextinrect: (CGRect) Requestedrect {
  38. CGRect actualrect = [self textrectforbounds:requestedrect limitedToNumberOfLines:self.numberOfLines];
  39. [Super Drawtextinrect:actualrect];
  40. }
  41. @end

When in use:

[CPP]View Plaincopy
  1. Lbl_mylabel = [[Myuilabel alloc] Initwithframe:cgrectmake (20, 50, 150, 600)];
  2. Uicolor *color = [Uicolor colorwithpatternimage:[uiimage imagenamed:@"Halftransparent.png"]]; //Use a translucent picture as the label's background color   
  3. Lbl_mylabel.backgroundcolor = color;
  4. Lbl_mylabel.textalignment = Uitextalignmentleft;
  5. Lbl_mylabel.textcolor = Uicolor.whitecolor;
  6. Lbl_mylabel.linebreakmode = Uilinebreakmodewordwrap;
  7. Lbl_mylabel.numberoflines = 0;
  8. [Lbl_mylabel Setverticalalignment:verticalalignmenttop];
  9. [Self Addsubview:lbl_mylabel];

IOS uilabel settings Align, center, align

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