A line of code implemented in the SWIFT Environment Uilabel aligned in the center

First create a new. h file in Xcode and copy the following code in

  myuilabel.h//  ////  Created by yexiaozi_007 on 3/4/13.//  Copyright (c) yexiaozi_007. All rights reserved.//#import <uikit/uikit.h>typedef enum{    verticalalignmenttop = 0,//default    Verticalalignmentmiddle,    Verticalalignmentbottom,} verticalalignment; @interface myuilabel:uilabel{@ Privateverticalalignment _verticalalignment;} @property (nonatomic) verticalalignment verticalalignment; @end

To create a new. m file, copy the following code into the

myuilabel.m//////Created by yexiaozi_007 on 3/4/13.//Copyright (c) yexiaozi_007. All rights reserved.//#import "MyUILabel.h" @implementation myuilabel@synthesize verticalalignment = VerticalAlignment _;-(ID) initWithFrame: (CGRect) Frame {if (self = [Super Initwithframe:frame]) {self.verticalalignment = Vertica    Lalignmentmiddle; } 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];} @end

If this is the first. m file that you imported, Xcode will prompt you to create a bridging-header, select OK

Copy the code below into the newly created Bridging-header file.

#import "MyUILabel.h"

Then open your storyboard, click on the label you want to change the way to it, and change its class to Myuilabel, as follows

Then right-drag the label or left-click the command key to drag the line to the label's parent view's class to generate the outlet, if it was already connected, then after the custom class is changed, Change the Uilabel in the line generation code to Myuilabel, as follows

Then you can call the label's class method

Label.verticalalignment = Verticalalignmentbottom

According to the above code can be achieved in the next to it, the center of the code in the bottom changed to middle and top, the default is the

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A line of code implemented in the SWIFT Environment Uilabel aligned in the center