IOS uilabel settings Align, center, align

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

2. //   
4. //MyUILabel.h   
6. //     
8. //   
10. //Created by yexiaozi_007 on 3/4/13.   
12. //Copyright (c) yexiaozi_007. All rights reserved.   
14. //   
18. #import <UIKit/UIKit.h>   
20. typedef enum
22. {
24. Verticalalignmenttop = 0, //default
26. Verticalalignmentmiddle,
28. Verticalalignmentbottom,
30. } VerticalAlignment;
32. @interface Myuilabel:uilabel
34. {
36. @Private
38. VerticalAlignment _verticalalignment;
40. }
44. @property (nonatomic) VerticalAlignment verticalalignment;
48. @end

[CPP]View Plaincopy

2. //   
4. //MYUILABEL.M   
6. //     
8. //   
10. //Created by yexiaozi_007 on 3/4/13.   
12. //Copyright (c) yexiaozi_007. All rights reserved.   
14. //   
18. #import "MyUILabel.h"   
22. @implementation Myuilabel
24. @synthesize verticalalignment = Verticalalignment_;
28. -(ID) initWithFrame: (CGRect) Frame {
30. if (self = [Super Initwithframe:frame]) {
32. Self.verticalalignment = Verticalalignmentmiddle;
34. }
36. return  Self ;
38. }
42. -(void) setverticalalignment: (verticalalignment) VerticalAlignment {
44. Verticalalignment_ = VerticalAlignment;
46. [Self setneedsdisplay];
48. }
52. -(CGRect) Textrectforbounds: (cgrect) Bounds Limitedtonumberoflines: (Nsinteger) NumberOfLines {
54. CGRect textrect = [Super Textrectforbounds:bounds limitedtonumberoflines:numberoflines];
56. Switch (self.verticalalignment) {
58. Case Verticalalignmenttop:
60. TEXTRECT.ORIGIN.Y = BOUNDS.ORIGIN.Y;
62. Break  ;
64. Case Verticalalignmentbottom:
66. TEXTRECT.ORIGIN.Y = Bounds.origin.y + bounds.size.height-textrect.size.height;
68. Break  ;
70. Case Verticalalignmentmiddle:
72. //Fall through.   
74. default :  
76. TEXTRECT.ORIGIN.Y = Bounds.origin.y + (bounds.size.height-textrect.size.height)/2.0;
78. }
80. return  Textrect;
82. }
86. -(void) Drawtextinrect: (CGRect) Requestedrect {
88. CGRect actualrect = [self textrectforbounds:requestedrect limitedToNumberOfLines:self.numberOfLines];
90. [Super Drawtextinrect:actualrect];
92. }
98. @end

When in use:

[CPP]View Plaincopy

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

IOS uilabel settings Align, center, align