NSMutableAttributedString 多样化显示文本以及NSTextAttachment实现图文混排

#import "ViewController.h"

@interface ViewController ()<UITextViewDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    UIView *bgview = [[UIView alloc] initWithFrame:CGRectMake(20, 200, self.view.frame.size.width-40,60)];
    bgview.backgroundColor  = [UIColor lightGrayColor];
    [self.view addSubview:bgview];
    
    UITextView *textview = [[UITextView alloc] initWithFrame:CGRectMake(50, 10, bgview.frame.size.width-100, 40) textContainer:nil];
    textview.backgroundColor = [UIColor whiteColor];
    textview.font = [UIFont systemFontOfSize:20];
    textview.delegate = self;
    textview.text = @"我的网址:http://www.baidu.com";
    [bgview addSubview:textview];
    
    //UILabel  UITextField  UItextView
    //多样化显示文本：下划线 字体大小颜色粗细 URL链接
    //attributedText
    //1.将原来的普通文本转化为属性文本 NSAttributedString
    NSMutableAttributedString*attrstr= [[NSMutableAttributedString alloc] initWithString:textview.text] ;
    //2.设置自己的样式  我的网址:http://www.baidu.com
    /*(1)下划线  NSUnderlineStyleAttributeName
     下划线颜色
NSUnderlineColorAttributeName
    (2)删除线
NSStrikeyhroughStyleAttributeName
     删除线颜色NSStrikethroughColorAttributeName
    (3)字体
     NSFontAttributeName
     (4)
     NSStrokeWidthAttributeName ->设置笔画宽度(粗细)，取值为 NSNumber 对象（整数），负值填充效果，正值中空效果 NSStrokeColorAttributeName ->填充部分颜色，不是字体颜色，取值为 UIColor 对象
     (5)url链接
     NSLinkAttributeName
    */
    [attrstr setAttributes:@{NSUnderlineStyleAttributeName:@1,NSUnderlineColorAttributeName:[UIColor redColor],NSStrikethroughStyleAttributeName:@1,NSStrikethroughColorAttributeName:[UIColor blackColor],NSFontAttributeName:[UIFont systemFontOfSize:25],NSLinkAttributeName:@"http://www.baidu.com"} range:NSMakeRange(5, 20)];
    //将多样化文本赋给textview
    textview.attributedText = attrstr;
    
    //创建图片附件NSTextAttachment  文本附件 实现图文混排
    NSTextAttachment *attach=[[NSTextAttachment alloc] init];
    attach.image = [UIImage imageNamed:@"face"];
    attach.bounds = CGRectMake(0, 0, 20, 20);
    //将这个图片转化为属性字符串
    NSAttributedString *imageAttr = [NSAttributedString attributedStringWithAttachment:attach];
    //属性字符串的拼接
    [attrstr appendAttributedString:imageAttr];
    
    //赋值属性字符串
    textview.attributedText=attrstr;
    


    
}