-(instancetype)init{
if (self = [super init]) {
[self initTagView];
}
return self;
}
-(instancetype)initWithFrame:(CGRect)frame{
if (self = [super initWithFrame:frame]) {
[self initTagView];
}
return self;
}
-(void)initTagView{
self.numberOfLines = 0;
self.lineBreakMode = NSLineBreakByWordWrapping;
self.displaysAsynchronously = YES;
}
-(void)setTagAttr:(NSMutableAttributedString *)tagAttr{
_tagAttr = tagAttr;
[self initTagView];
self.attributedText = _tagAttr;
}
NSMutableAttributedString +XWTagView的核心代码
1.tip:创建标签的时候在子线程体验更好（生成富文本比较耗时）
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "XWTagMaker.h"
@interface NSMutableAttributedString (XWTagView)
//当前标签富文本的高度
@property (nonatomic,assign) CGFloat tagHeight;
/**
快速创建tag标签所需样式
@param tags 字符串数组
@param maskBlock 初始化标签样式
@return 标签所需的NSMutableAttributedString
*/
+(NSMutableAttributedString *)xw_makeTagAttributedString:(NSArray<NSString *> *)tags tagMaker:(void (^)(XWTagMaker *))maskBlock;
@end
+(NSMutableAttributedString *)xw_makeTagAttributedString:(NSArray<NSString *> *)tags tagMaker:(void (^)(XWTagMaker *))maskBlock{
NSMutableAttributedString *text = [NSMutableAttributedString new];
NSInteger height = 0;
XWTagMaker *maker = [[XWTagMaker alloc] init];
if (maskBlock) {
maskBlock(maker);
}
for (int i = 0; i < tags.count; i++) {
NSString *tag = tags[i];
NSMutableAttributedString *tagText = [[NSMutableAttributedString alloc] init];
//标签左内边距
[tagText appendAttributedString:[self creatEmptyAttributeString:fabs(maker.insets.left)]];
//标签内容
[tagText yy_appendString:tag];
//标签右内边距
[tagText appendAttributedString:[self creatEmptyAttributeString:fabs(maker.insets.right)]];
//设置外观
[self beautifyAttributedStringWithText:tagText ranges:NSMakeRange(0, tagText.length) maker:maker];
//左右间距
[tagText appendAttributedString:[self creatEmptyAttributeString:maker.space]];
//行间距等设置
[text appendAttributedString:tagText];
text.yy_lineSpacing = maker.lineSpace;
text.yy_lineBreakMode = NSLineBreakByWordWrapping;
//高度计算（超最大范围加换行符手动换行）
YYTextContainer *tagContarer = [YYTextContainer new];
tagContarer.size = CGSizeMake(maker.maxWidth - 3,CGFLOAT_MAX);
YYTextLayout *tagLayout = [YYTextLayout layoutWithContainer:tagContarer text:text];
if (tagLayout.textBoundingSize.height > height) {
if (height != 0) {
[text yy_insertString:@"n" atIndex:text.length - tagText.length];
}
tagLayout = [YYTextLayout layoutWithContainer:tagContarer text:text];
height = tagLayout.textBoundingSize.height;
}
}
//高度记录（富文本已扩展高度属性）
text.tagHeight = height + maker.lineSpace + fabs(maker.insets.top) + fabs(maker.insets.bottom) ;
//对齐方向设置（头尾自动缩进1.5）
[text addAttribute:NSParagraphStyleAttributeName value:[self creatTextStyle:maker]
range:NSMakeRange(0, text.length)];
return text;
}
+(void) beautifyAttributedStringWithText:(NSMutableAttributedString * )tagText ranges:(NSRange)range maker:(XWTagMaker *)maker{
//标签字体颜色设置
tagText.yy_font = maker.font;
tagText.yy_color = maker.textColor;
[tagText yy_setTextBinding:[YYTextBinding bindingWithDeleteConfirm:NO] range:tagText.yy_rangeOfAll];
//设置item外观样式
[tagText yy_setTextBackgroundBorder:[self creatTextBoard:maker] range:range];
}
/**
外观样式
@param maker tag外观配置
@return 返回YYTextBorder
*/
+(YYTextBorder *)creatTextBoard:(XWTagMaker *)maker{
YYTextBorder *border = [YYTextBorder new];
border.strokeWidth = maker.strokeWidth;
border.strokeColor = maker.strokeColor;
border.fillColor = maker.fillColor;
border.cornerRadius = maker.cornerRadius; // a huge value
border.lineJoin = maker.lineJoin;
border.insets = UIEdgeInsetsMake(maker.insets.top, 0, maker.insets.bottom, 0);
return border;
}
+(NSMutableAttributedString *)creatEmptyAttributeString:(CGFloat)width{
NSMutableAttributedString *spaceText = [NSMutableAttributedString yy_attachmentStringWithContent:[[UIImage alloc]init] contentMode:UIViewContentModeScaleToFill attachmentSize:CGSizeMake(width, 1) alignToFont:[UIFont systemFontOfSize:0] alignment:YYTextVerticalAlignmentCenter];
return spaceText;
}
+(NSMutableParagraphStyle *)creatTextStyle:(XWTagMaker *)maker{
NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
style.lineSpacing = maker.lineSpace;
style.firstLineHeadIndent = 1.5;
style.headIndent = 1.5 ;//设置与首部的距离
style.tailIndent = maker.tagAlignment == NSTextAlignmentRight ? maker.maxWidth - fabs(maker.insets.right) : maker.maxWidth - 1.5; //设置与尾部的距离
switch (maker.tagAlignment) {
case XWTagAlignmentLeft:
style.alignment = NSTextAlignmentLeft;
break;
case XWTagAlignmentCenter:
style.alignment = NSTextAlignmentCenter;
break;
case XWTagAlignmentRight:
style.alignment = NSTextAlignmentRight;
break;
default:
break;
}
return style;
}
