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(, , , )];

    label.edgeInsets          = UIEdgeInsetsMake(,  + , ,  + ); // 设置内边距

    label.font                = [UIFont fontWithName:@"HelveticaNeue-Thin" size:.f];

    label.text                = @"No Zuo No Die";

    [label sizeToFit]; // 重新计算尺寸

    label.layer.cornerRadius  = label.frame.size.height / .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: