YYText使用篇（三）

版本记录

版本号	时间
V1.0	2017.06.06

前言

YYText是一个专门处理文字的框架，有了它处理文字变得非常方便，这一篇我继续介绍YYText的使用方法，希望对大家能有所帮助。大家如感兴趣还可以参考：
1.YYText使用篇（一）
2.YYText使用篇（二）

一、YYText图文混排

下面首先看所需要的方法

/**
 Creates and returns an attachment.
 
 
 Example: ContentMode:bottom Alignment:Top.
 
      The text      The attachment holder
         ↓                ↓
     ─────────┌──────────────────────┐───────
        / \   │                      │ / ___|
       / _ \  │                      │| |
      / ___ \ │                      │| |___     ←── The text line
     /_/   \_\│    ██████████████    │ \____|
     ─────────│    ██████████████    │───────
              │    ██████████████    │
              │    ██████████████ ←───────────────── The attachment content
              │    ██████████████    │
              └──────────────────────┘

 @param content        The attachment (UIImage/UIView/CALayer).
 @param contentMode    The attachment's content mode in attachment holder
 @param attachmentSize The attachment holder's size in text layout.
 @param fontSize       The attachment will align to this font.
 @param alignment      The attachment holder's alignment to text line.
 
 @return An attributed string, or nil if an error occurs.
 @since YYText:6.0
 */
+ (NSMutableAttributedString *)yy_attachmentStringWithContent:(nullable id)content
                                                  contentMode:(UIViewContentMode)contentMode
                                               attachmentSize:(CGSize)attachmentSize
                                                  alignToFont:(UIFont *)font
                                                    alignment:(YYTextVerticalAlignment)alignment;

下面我们看个例子

#import "JJTextVC.h"
#import "YYText.h"

@interface JJTextVC ()

@end

@implementation JJTextVC

#pragma mark - Override Base Function

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor lightTextColor];
    
    self.title = @"YYText";

    //图文混排
    [self imageTextLayout];
}

#pragma mark - Object Private Function

//图文混排
- (void)imageTextLayout
{
    NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"旧时月色,算几番照我,梅边吹笛?唤起玉人,不管清寒与攀摘.何逊而今渐老,都忘却,春风词笔. "];
    UIFont *font = [UIFont systemFontOfSize:18];
    
    // 嵌入 UIImage
    UIImage *image = [UIImage imageNamed:@"group_prooerty_selected"];
    NSMutableAttributedString *attachment = nil;
    attachment = [NSMutableAttributedString yy_attachmentStringWithContent:image contentMode:UIViewContentModeCenter attachmentSize:image.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
    [text appendAttributedString: attachment];
    
    NSMutableAttributedString *text1 = [[NSMutableAttributedString alloc] initWithString:@"但怪得,竹外疏花,春冷入瑶席.江国,正寂寂.叹寄与路遥,夜雪初积.翠尊易泣,红萼无言耿相忆.常记曾携手处,千树压.梅湖寒碧,又片片吹尽也,何时得见?"];
    [text appendAttributedString: text1];
    
    // 嵌入 UIImage
    UIImage *image1 = [UIImage imageNamed:@"live_score_image"];
    NSMutableAttributedString *attachment1 = nil;
    attachment1 = [NSMutableAttributedString yy_attachmentStringWithContent:image1 contentMode:UIViewContentModeCenter attachmentSize:image.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
    [text appendAttributedString: attachment1];
    
    YYLabel *yyLabel = [[YYLabel alloc] init];
    yyLabel.attributedText = text;
    yyLabel.numberOfLines = 0;
    yyLabel.textColor = [UIColor blueColor];
    yyLabel.font = [UIFont boldSystemFontOfSize:20.0];
    yyLabel.frame = CGRectMake(0.0, 64.0, self.view.bounds.size.width, 500.0);
    [self.view addSubview:yyLabel];
}

@end

下面看输出结果

图文混排

---

二、YYText布局计算

下面看YYText的图文混排布局计算，还是先看代码吧。

#import "JJTextVC.h"
#import "YYText.h"

@interface JJTextVC ()

@end

@implementation JJTextVC

#pragma mark - Override Base Function

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor lightTextColor];
    
    self.title = @"YYText";

    //布局计算
    [self layoutCaculation];
}

#pragma mark - Object Private Function

//布局计算
- (void)layoutCaculation
{
    NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"旧时月色,算几番照我,梅边吹笛?唤起玉人,不管清寒与攀摘.何逊而今渐老,都忘却,春风词笔.但怪得,竹外疏花,春冷入瑶席.江国,正寂寂.叹寄与路遥,夜雪初积.翠尊易泣,红萼无言耿相忆.常记曾携手处,千树压.梅湖寒碧,又片片吹尽也,何时得见? "];
    text.yy_font = [UIFont boldSystemFontOfSize:18.0];
    text.yy_color = [UIColor blueColor];

    
    CGSize size = CGSizeMake(300, CGFLOAT_MAX);
    YYTextLayout *layout = [YYTextLayout layoutWithContainerSize:size text:text];
    [layout lineIndexForPoint:CGPointMake(10,10)];
    [layout closestLineIndexForPoint:CGPointMake(10,10)];
    [layout closestPositionToPoint:CGPointMake(10,10)];
    [layout textRangeAtPoint:CGPointMake(10,10)];
    [layout rectForRange:[YYTextRange rangeWithRange:NSMakeRange(10,20)]];
    [layout selectionRectsForRange:[YYTextRange rangeWithRange:NSMakeRange(10,20)]];
    
    YYLabel *label = [[YYLabel alloc] init];
    label.textColor = [UIColor blueColor];
    label.frame = CGRectMake(0.0, 64.0, self.view.bounds.size.width, 500.0);
    label.attributedText= text;
    label.textLayout = layout;
    [self.view addSubview:label];
}
@end

下面看结果

布局计算

  我也不清楚这个例子举的对不对，如果有不对的地方希望大家能批评真正，欢迎留言。

后记

  最近项目挺忙的，所以能每天写点已经抽出很多时间了，难免有错误，不对的地方希望能给我指正出来，谢谢大家。

东北雪景