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 
     
      @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: