iOS Uilabel settings are aligned, centered, aligned

The text in the default Uilabel in iOS can be aligned vertically in the vertical direction, and I inherit a new class from Uilabel, enabling alignment, alignment, and alignment. Specific as follows:

1. Create a new class VerticalAlignmentLabel.h inherit from Uilabel

2.

//

VerticalAlignmentLabel.h

Inface

//

Created by Huangzengsong on 15/5/10.

Copyright (c) 2015 Huangzs. All rights reserved.

//

#import <UIKit/UIKit.h>

typedef enum

{

Verticalalignmenttop = 0,//default

Verticalalignmentmiddle,

Verticalalignmentbottom,

} VerticalAlignment;

@interface Verticalalignmentlabel:uilabel

{

@private

VerticalAlignment _verticalalignment;

}

@property (nonatomic) VerticalAlignment verticalalignment;

@end

3.

//

verticalalignmentlabel.m

Inface

//

Created by Huangzengsong on 15/5/10.

Copyright (c) 2015 Huangzs. All rights reserved.

//

#import "VerticalAlignmentLabel.h"

@implementation Verticalalignmentlabel

@synthesize verticalalignment = Verticalalignment_;

-(ID) initWithFrame: (CGRect) Frame {

if (self = [Super Initwithframe:frame]) {

Self.verticalalignment = Verticalalignmentmiddle;

}

return self;

}

-(void) Setverticalalignment: (verticalalignment) VerticalAlignment {

Verticalalignment_ = VerticalAlignment;

[Self setneedsdisplay];

}

-(CGRect) Textrectforbounds: (cgrect) Bounds Limitedtonumberoflines: (Nsinteger) NumberOfLines {

CGRect textrect = [Super Textrectforbounds:bounds limitedtonumberoflines:numberoflines];

Switch (self.verticalalignment) {

Case Verticalalignmenttop:

TEXTRECT.ORIGIN.Y = BOUNDS.ORIGIN.Y;

Break

Case Verticalalignmentbottom:

TEXTRECT.ORIGIN.Y = Bounds.origin.y + bounds.size.height-textrect.size.height;

Break

Case Verticalalignmentmiddle:

Fall through.

Default

TEXTRECT.ORIGIN.Y = Bounds.origin.y + (bounds.size.height-textrect.size.height)/2.0;

}

return textrect;

}

-(void) Drawtextinrect: (CGRect) Requestedrect {

CGRect actualrect = [self textrectforbounds:requestedrect limitedToNumberOfLines:self.numberOfLines];

[Super Drawtextinrect:actualrect];

}

/*

Only override Drawrect:if perform custom drawing.

An empty implementation adversely affects performance during animation.

-(void) DrawRect: (cgrect) Rect {

Drawing Code

}

*/

@end

4. Importing header files when calling

#import "VerticalAlignmentLabel.h"

5.

[Self. Detaillabel Setverticalalignment:verticalalignmenttop];

iOS Uilabel settings are aligned, centered, aligned