iOS基础总结--常见文本编辑样式的简单总结(富文本)

八尺龙须方锦褥,已凉天气未寒时!<顿甲>

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• 下面是和好友@by小杰整理的一些内容

typedef NS_ENUM(NSInteger, NSLineBreakMode) {
   NSLineBreakByWordWrapping = 0, 
   NSLineBreakByCharWrapping,
   NSLineBreakByClipping, //减掉后面显示不了的部分
   NSLineBreakByTruncatingHead,  //头部内容以......方式省略
   NSLineBreakByTruncatingTail,    //尾部内容以......方式省略
   NSLineBreakByTruncatingMiddle  //中间内容以......方式省略
} NS_ENUM_AVAILABLE_IOS(6_0);```

typedef NS_ENUM(NSInteger, NSWritingDirection) {
NSWritingDirectionNatural = -1, // Determines direction using the Unicode Bidi Algorithm rules P2 and P3
NSWritingDirectionLeftToRight = 0, // Left to right writing direction 左到右的书写方向
NSWritingDirectionRightToLeft = 1 // Right to left writing direction 右到左的书写方向
} NS_ENUM_AVAILABLE_IOS(6_0);```

#段落风格
// NSParagraphStyleAttributeName 段落的风格（设置首行，行间距，对齐方式什么的）看自己需要什么属性，写什么 
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init]; 
paragraphStyle.lineSpacing = 10;// 字体的行间距 
paragraphStyle.firstLineHeadIndent = 20.0f;//首行缩进 
paragraphStyle.alignment = NSTextAlignmentJustified;//（两端对齐的）文本对齐方式：（左，中，右，两端对齐，自然）
paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;//结尾部分的内容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz") 
paragraphStyle.headIndent = 20;//整体缩进(首行除外) 
paragraphStyle.tailIndent = 20;// 
paragraphStyle.minimumLineHeight = 10;//最低行高 
paragraphStyle.maximumLineHeight = 20;//最大行高 
paragraphStyle.paragraphSpacing = 15;//段与段之间的间距 
paragraphStyle.paragraphSpacingBefore = 22.0f;//段首行空白空间/* Distance between the bottom of the previous paragraph (or the end of its paragraphSpacing, if any) and the top of this paragraph. */ 
paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight;//从左到右的书写方向（一共➡️三种）
paragraphStyle.lineHeightMultiple = 15;/* Natural line height is multiplied by this factor (if positive) before being constrained by minimum and maximum line height. */ 
paragraphStyle.hyphenationFactor = 1;//连字属性 在iOS，唯一支持的值分别为0和1

#字体大小
/*  NSFontAttributeName 字体大小  NSParagraphStyleAttributeName 段落的风格（设置首行，行间距，对齐方式什么的）  NSKernAttributeName 字间距  */
 NSDictionary *attributes = @{        
       NSFontAttributeName:[UIFont systemFontOfSize:15],             
       NSParagraphStyleAttributeName:paragraphStyle,         
       NSKernAttributeName:@(10),                       
  }; 

#简单应用
textView.attributedText = [[NSAttributedString alloc] initWithString:textView.text attributes:attributes];

实现效果:

富文本.png

实现代码

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UILabel *label1;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //创建富文本对象
    NSMutableAttributedString *attrrbute1 = [[NSMutableAttributedString alloc] initWithString:self.label1.text];
    
    //设置字体大小
    [attrrbute1 addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:29] range:NSMakeRange(5, 4)];

    //设置字体颜色
    [attrrbute1 addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(10, 4)];
    
    //设置字体背景颜色
    [attrrbute1 addAttribute:NSBackgroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(15, 5)];
    
    //设置删除线
    [attrrbute1 addAttribute:NSStrikethroughStyleAttributeName value:[NSNumber numberWithInteger:1] range:NSMakeRange(31, 10)];
    
    //设置下划线
    [attrrbute1 addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:2] range:NSMakeRange(40, 10)];
    
    //一下两者必须结合使用
    //设置空心字颜色
    [attrrbute1 addAttribute:NSStrokeColorAttributeName value:[UIColor orangeColor] range:NSMakeRange(50, 10)];
    //空心字边框颜色
    [attrrbute1 addAttribute:NSStrokeWidthAttributeName value:[NSNumber numberWithInteger:1] range:NSMakeRange(50, 10)];

    //将富文本属性添加到控件上
    self.label1.attributedText = attrrbute1;

    
}

@end```

![UILabel.png](http://upload-images.jianshu.io/upload_images/1803308-6c0cfaa74775cc1f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
```code
----- UILabel -----
  
//1 创建Label
     UILabel *namelabel = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
//2 设置属性
     //设置文字
     namelabel.text = @"姓名";
     
     //设置背景颜色
     namelabel.backgroundColor = [UIColor whiteColor];
     
     //设置内容对齐方式
     namelabel.textAlignment = NSTextAlignmentCenter;
     
     //设置内容字体大小
     //namelabel.font = [UIFont systemFontOfSize:20];
     namelabel.font = [UIFont fontWithName:@"Helvetica-Bold" size:20];
     
     //设置文字超出, 换行显示
     namelabel.lineBreakMode = NSLineBreakByCharWrapping;
     namelabel.numberOfLines = 0;
     
     //设置Label圆角
     namelabel.layer.borderWidth = 1;
     namelabel.layer.cornerRadius = 8;
     namelabel.layer.masksToBounds = YES;

     //设置文字效果
     //阴影效果
     namelabel.shadowColor = [UIColor colorWithRed:0.203 green:0.260 blue:0.571 alpha:0.462];
     
     //阴影位置
     namelabel.shadowOffset = CGSizeMake(5, 5);// (x, y)
     
     //设置文字角度
     namelabel.transform = CGAffineTransformMakeRotation(0.2);
     
     //添加富文本
     //1 声明富文本
     NSMutableAttributedString *attributeStr = [[NSMutableAttributedString alloc] initWithString:@"富文本文字+ 测试换行文字文字文字文字文字文字"];
     
     //2 设置富文本内容样式
     //2.1 字体大小
     //参数一: 修改的属性  参数二: 类型的具体值  参数三: 修改的区间
     [attributeStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:40] range:NSMakeRange(0, 3)];
     
     //2.2 设置空心字
     [attributeStr addAttribute:NSStrokeWidthAttributeName value:@2 range:NSMakeRange(0, 4)];
     
     //2.3 设置空心字颜色
     [attributeStr addAttribute:NSStrokeColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 4)];
     
     //3 为label指定富文本对象(需要放置在富文本样式后面)
     namelabel.attributedText = attributeStr;
    

     //namelabel.backgroundColor = [UIColor colorWithRed:0.792 green:1.000 blue:0.814 alpha:1.000];

//3 添加到视图
     [self.view addSubview:namelabel];