iOS创建支持长按复制的Label控件

- (void)iOSDevloperLearn4UILabel{
    
    
    // 1.1 创建UILabel对象
    UILabel *label = [[UILabel alloc] init];
    
    // 1.2 设置frame
    label.frame = CGRectMake(100, 100, 202, 175);
    
    // 1.3 设置背景颜色
    label.backgroundColor = [UIColor redColor];
    
    // 1.4 设置文字    label.text = @"公众号：iOS逆向";
    label.text = @"博客地址：https://kunnan.blog.csdn.net #公众号：iOS逆向 ";

    
    // 1.5 居中
    label.textAlignment = NSTextAlignmentCenter;
    
    // 1.6 设置字体大小
    label.font = [UIFont systemFontOfSize:20.f];
    label.font = [UIFont boldSystemFontOfSize:25.f];
    label.font = [UIFont italicSystemFontOfSize:20.f];
    
    // 1.7 设置文字的颜色
    label.textColor = [UIColor whiteColor];
    
    // 1.8 设置阴影(默认是有值)
    label.shadowColor = [UIColor blackColor];
    label.shadowOffset = CGSizeMake(-2, 1);
    
    // 1.9 设置行数(0:自动换行)
    label.numberOfLines = 1;
    
    // 1.10 显示模式
    label.lineBreakMode =  NSLineBreakByTruncatingHead;
    
    /*
     NSLineBreakByWordWrapping = 0,  // 单词包裹,换行的时候会以一个单词换行
     NSLineBreakByCharWrapping,        // 字符包裹换行,换行的时候会以一个字符换行
     NSLineBreakByClipping,        // 裁剪超出的内容
     NSLineBreakByTruncatingHead,    // 一行中头部省略(注意:numberOfLines要为1): "...wxyz"
     NSLineBreakByTruncatingTail,    // 一行中尾部省略: "abcd..."
     NSLineBreakByTruncatingMiddle    // 一行中中间部省略:  "ab...yz"
     */
    
    
    // 2.0 添加到控制器的view中
    [self.view addSubview:label];

}

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface QCTCopyLabel : UILabel
- (instancetype)init;

@end

//
//  QCTCopyTextLabel.m
//  retail
//
//  Created by mac on 2020/1/17.
//  Copyright © 2020 QCT. All rights reserved.
//

#import "QCTCopyTextLabel.h"

@implementation QCTCopyTextLabel

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/
- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self setUp];
    }
    return self;
}

- (instancetype)init {
    self = [super init];
    if (self) {
        [self setUp];
    }
    return self;
}

// 设置label可以成为第一响应者
- (BOOL)canBecomeFirstResponder {
    return YES;
}

// 设置长按事件
- (void)setUp {
    /* 你可以在这里添加一些代码，比如字体、居中、夜间模式等 */
    self.userInteractionEnabled = YES;
    [self addGestureRecognizer:[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress)]];
}

// 长按事件
- (void)longPress {
    // 设置label为第一响应者
    [self becomeFirstResponder];
    // 自定义 UIMenuController
    UIMenuController * menu = [UIMenuController sharedMenuController];
    UIMenuItem * item1 = [[UIMenuItem alloc]initWithTitle:QCTLocal(@"copy") action:@selector(copyText:)];
    menu.menuItems = @[item1];
    [menu setTargetRect:self.bounds inView:self];
    [menu setMenuVisible:YES animated:YES];
}

// 设置label能够执行那些具体操作
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    if(action == @selector(copyText:)) return YES;
    return NO;
}

// 复制方法
- (void)copyText:(UIMenuController *)menu {
    // 没有文字时结束方法
    if (!self.text) return;
    // 复制文字到剪切板
    UIPasteboard * paste = [UIPasteboard generalPasteboard];
    paste.string = self.text;
}



@end