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  • 可以简易设置文字内边距的EdgeInsetsLabel

    可以简易设置文字内边距的EdgeInsetsLabel

    最终效果:

    源码:

    EdgeInsetsLabel.h 与 EdgeInsetsLabel.m

    //
    //  EdgeInsetsLabel.h
    //  EdgeInsetsLabel
    //
    //  Created by YouXianMing on 14/10/27.
    //  Copyright (c) 2014年 YouXianMing. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface EdgeInsetsLabel : UILabel
    
    @property(nonatomic, assign) UIEdgeInsets edgeInsets;
    
    @end
    //
    //  EdgeInsetsLabel.m
    //  EdgeInsetsLabel
    //
    //  Created by YouXianMing on 14/10/27.
    //  Copyright (c) 2014年 YouXianMing. All rights reserved.
    //
    
    #import "EdgeInsetsLabel.h"
    
    @implementation EdgeInsetsLabel
    
    - (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines {
        UIEdgeInsets insets = self.edgeInsets;
        CGRect rect = [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, insets)
                        limitedToNumberOfLines:numberOfLines];
        
        rect.origin.x    -= insets.left;
        rect.origin.y    -= insets.top;
        rect.size.width  += (insets.left + insets.right);
        rect.size.height += (insets.top + insets.bottom);
        
        return rect;
    }
    
    - (void)drawTextInRect:(CGRect)rect {
        [super drawTextInRect:UIEdgeInsetsInsetRect(rect, self.edgeInsets)];
    }
    
    @end

    ViewController.m

    //
    //  ViewController.m
    //  SetInsets
    //
    //  Created by YouXianMing on 14/10/27.
    //  Copyright (c) 2014年 YouXianMing. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "EdgeInsetsLabel.h"
    
    @interface ViewController ()
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        
        EdgeInsetsLabel *label    = [[EdgeInsetsLabel alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
        label.edgeInsets          = UIEdgeInsetsMake(8, 8 + 10, 8, 8 + 10); // 设置内边距
        label.font                = [UIFont fontWithName:@"HelveticaNeue-Thin" size:30.f];
        label.text                = @"No Zuo No Die";
        [label sizeToFit]; // 重新计算尺寸
        label.layer.cornerRadius  = label.frame.size.height / 2.f;
        label.backgroundColor     = [UIColor blackColor];
        label.textColor           = [UIColor redColor];
        label.layer.masksToBounds = YES;
        label.center              = self.view.center;
        
        [self.view addSubview:label];
    }
    
    @end

    核心原理:

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  • 原文地址:https://www.cnblogs.com/YouXianMing/p/4054535.html
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