[iOS]富文本编辑器

产品设计要求前端优化让用户能提交和展示更加个性化的内容，还好在网络上有找到类似工具。
工具ZSSRichTextEditor

 效果：

#import "GATextViewController.h"
#import "ZSSDemoViewController.h"
#import "UILabel+CopyText.h"

@interface GATextViewController ()

@property (weak, nonatomic) IBOutlet UILabel *showLabel;
@property (strong, nonatomic) NSString *htmlString;


@end

@implementation GATextViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    UILongPressGestureRecognizer *tapText = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(tapTextCopyAction:)];
    [_showLabel addGestureRecognizer:tapText];
    
    _htmlString = @"今天我不回家吃饭，你自己解决晚餐，注意关掉空调。  ";
    [self setTopicLabelWithLabel:_showLabel Text:_htmlString];
}

// 复制
- (void)tapTextCopyAction:(UILongPressGestureRecognizer *)gesture {
    if (gesture.state == UIGestureRecognizerStateBegan) {
        [_showLabel showMemuController:_showLabel.bounds];
    }
}

// 编辑
- (IBAction)tapTextLabelAction:(id)sender {
    [self enterEditTextWithContext:_htmlString];
}

// 进入文字编辑页面
- (void)enterEditTextWithContext:(NSString *)context {
    ZSSDemoViewController *vc = [[ZSSDemoViewController alloc] init];
    vc.context = context;
    __weak typeof(self) weakSelf = self;
    [vc setEditBlock:^(NSString *newContext) {
        weakSelf.htmlString = newContext;
        [self setTopicLabelWithLabel:weakSelf.showLabel Text:weakSelf.htmlString];
    }];
    vc.hidesBottomBarWhenPushed = YES;
    [self.navigationController pushViewController:vc animated:YES];
}

// 设置文本
- (void)setTopicLabelWithLabel:(UILabel *)theLabel Text:(NSString *)text {
    if (!theLabel) {
        return;
    }
    if (![self judgeStringIsNull:text]) {
        text = @"";
    }
    text = [NSString stringWithFormat:@"
%@
",text];
    
    NSMutableAttributedString *attrStr = [theLabel.attributedText mutableCopy];
    [attrStr replaceCharactersInRange:NSMakeRange(0, attrStr.length) withString:@""];
    NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];
    // 设置行间距
    [paragraph setLineSpacing:5];
    // 设置段间距
    [paragraph setParagraphSpacingBefore:5];
    [attrStr addAttribute:NSParagraphStyleAttributeName value:paragraph range:NSMakeRange(0, attrStr.length)];

    [attrStr readFromData:[text dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType} documentAttributes:nil error:nil];
    theLabel.attributedText = attrStr;
    theLabel.numberOfLines = 0;
    // 自动换行，必须设置该属性，否则需自行添加高度
    theLabel.preferredMaxLayoutWidth = [UIScreen mainScreen].bounds.size.width - 20;
}

// 判断字符串是否不全为空
- (BOOL)judgeStringIsNull:(NSString *)string {
    if (![[string class] isSubclassOfClass:[NSString class]]) {
        return NO;
    }
    if ([[string class] isSubclassOfClass:[NSNumber class]]) {
        return YES;
    }
    BOOL result = NO;
    if (string != nil && string.length > 0) {
        for (int i = 0; i < string.length; i ++) {
            NSString *subStr = [string substringWithRange:NSMakeRange(i, 1)];
            if (![subStr isEqualToString:@" "] && ![subStr isEqualToString:@""]) {
                result = YES;
            }
        }
    }
    return result;
}

@end

不要下载，备份Demo:https://download.csdn.net/download/u012881779/11329348