yy_model及 YYLabel

一, yy_model

　　1.yy_model 可以存放包含数组的属性,调用方法如下:

 + (NSDictionary *)modelCustomPropertyMapper {
     return @{@"girlid" : @"id",
              @"gnumber" : @"info.gnumber",
              @"name" : @"info.name",
              @"icon" : @"info.icon",
              @"des" : @"info.des",
              @"arrayGiftData": @"gift"};
 }

 + (NSDictionary *)modelContainerPropertyGenericClass {
     return @{@"arrayGiftData" : [GoddessGiftData class]};
 }
 - (BOOL)modelCustomTransformFromDictionary:(NSDictionary *)dic {
     if( !ISDICTIONARY(dic) ) return NO;
     if (!ISSTRING(_url) || [_url isEqualToString:@""]) return NO;
     return YES;
 }

 @class Shadow, Border, Attachment;

 @interface Attributes
 @property (nonatomic,copy) NSString *name;
 @property (nonatomic,strong) NSArray<Shadow*>* shadows; //Array<Shadow>
 @property (nonatomic,strong)NSSet *borders; //Set<Border>
 @property (nonatomic,strong)NSMutableDictionary *attachments; //Dict<NSString,Attachment>
 @end

 @implementation Attributes
 // 返回容器类中的所需要存放的数据类型 (以 Class 或 Class Name 的形式)。
 + (NSDictionary *)modelContainerPropertyGenericClass {
     return @{@"shadows" : [Shadow class],
              @"borders" : Border.class,
              @"attachments" : @"Attachment" };
 }
 @end

二, YYLabel

　　1.在使用 YYLabel 时,一定要给该对象设置背景颜色,不然无法显示.

 NSMutableAttributedString *one = [[NSMutableAttributedString alloc] initWithString:@"Shadow"];
     one.yy_font = [UIFont boldSystemFontOfSize:];
     one.yy_color = [UIColor whiteColor];

     YYLabel *label = [YYLabel new];
     label.attributedText = one;
     label.frame = CGRectMake(, , , );
     // 以下语句很重要,不要漏掉
     label.backgroundColor = [UIColor colorWithWhite:0.933 alpha:1.000];
     [self.view addSubview:label];

　　2.在 cell 中使用 YYLabel 时,cell 重用时,其中的 YYLabel 视图有可能会被清除.....因此需要在复用 cell 或创建 cell 后,判断 YYLabel 视图是否存在:若不存在,就创建.

　　3.YYLabel 视图的 attributedText属性,和普通 UILabel 的 attributedText 属性,基本相同,赋值方法均为_chatMsgLabel.attributedText = attrStr;而且都可以直接使用 NSAttributedString 对象的 appendAttributedString 属性/ addAttribute 属性.

　　(PS:使用yy_attachmentStringWithContent:...时,就不要使用 addAttribute 属性了,)

YYLabel 视图一个很大的便捷是:使用 

NSMutableAttributedString 对象的拓展 yy_color 和  yy_setColor:range: 属性,快速设置文字的属性,代替了复杂的addAttribute 属性.

　　唯一不同的一点就是:YYLabel无法识别 NSAttributedString 类的 attributedStringWithAttachment 方法添加的图片.YYLabel 添加图片需要 NSAttributedString的拓展类方法:yy_attachmentStringWithContent:....

　　4.在cell 中调用YYLabel时,可以用其对象的 textLayout 属性来代替 attributedText 给YYLabel赋值,同时使用 textLayout 属性的 textBoundingSize 属性

来设置 YYLabel 的宽高.代码如下:

　　(PS:设置YYLabel 的宽高时,尽量比 YYTextLayout 对象的 textBoundingSize 属性大,不然显示不全文字.....一开始我也质疑该属性是否准确,但是通过看层次结构图之后,就确定是我需要加大 textBoundingSize 属性值了....一定要有一个勇于怀疑的心,多尝试!!!)

     YYLabel *infoLabel = [[YYLabel alloc] init];
     [middleView addSubview:infoLabel];
     _briefContentLabel = infoLabel;
     [infoLabel mas_makeConstraints:^(MASConstraintMaker *make) {
         make.top.mas_equalTo(seperateLine.mas_bottom).offset(cInfoViewTop);
         make.height.mas_equalTo();
         make.left.right.mas_equalTo(seperateLine);
     }];

// 创建 textLayout

- (YYTextLayout*)createTextLayout:(NSString *)newText

{

NSMutableAttributedString *attr = [[NSMutableAttributedString alloc] initWithString:newText];

attr.yy_font = [[PTVConfig instance] normalFont:10 ];

attr.yy_color = MAKECOLOR(0x9B, 0x9B, 0x9B);

attr.yy_lineSpacing = 5;

attr.yy_alignment = NSTextAlignmentCenter;

CGFloat maxWidth = subtitleMaxWidth  ;

CGSize containerSize = CGSizeMake(maxWidth , CGFLOAT_MAX);

YYTextLayout *layout = [YYTextLayout layoutWithContainerSize:containerSize text:attr];

return layout;

}

// 调用方式

- (void)updateLabelText:(NSString *)str

{

// 设置内容

self.subtitleLabel.textLayout = [self createTextLayout:str];

CGFloat labelHeight = [self heightOfInfoText:str];

[self.subtitleLabel mas_updateConstraints:^(MASConstraintMaker *make) {

make.height.mas_equalTo(labelHeight);

}];

}

// 高度往往有10个点的误差,需要比 YYLayout 计算的高度多10个点,参考https://www.jianshu.com/p/0b7759d63074

- (CGFloat)heightOfInfoText:(NSString *)str

{

YYTextLayout *layout = [self createTextLayout:str];

CGFloat infoHeight = layout.textBoundingSize.height + 10  ;

return infoHeight;

}

或者使用不同属性的字符串

 #pragma mark 设置特殊的文字和页面高度
 - (NSMutableAttributedString *)getCardSuccMsgAttrStr{
     NSMutableAttributedString *attr = [[NSMutableAttributedString alloc] initWithString:@"在接下来的30分钟内，主播收到的里程值会全部双倍"];
     attr.yy_font = [[PTVConfig instance] normalFont: ];
     attr.yy_color = MAKECOLOR(0x9B, 0x9B, 0x9B);
     [attr yy_setColor:UIColorFromRGB(0xD2800C) range:NSMakeRange(, )];
     attr.yy_lineSpacing = ;
     attr.yy_alignment = NSTextAlignmentCenter;
     return attr;
 }

 - (NSMutableAttributedString *)getPrestigeSuccMsgAttrStr{
     NSMutableAttributedString *attr = [[NSMutableAttributedString alloc] initWithString:@"主播声望值+1"];
     attr.yy_font = [[PTVConfig instance] normalFont: ];
     attr.yy_color = MAKECOLOR(0x9B, 0x9B, 0x9B);
     [attr yy_setColor:UIColorFromRGB(0xD2800C) range:NSMakeRange(, )];
     attr.yy_lineSpacing = ;
     attr.yy_alignment = NSTextAlignmentCenter;
     return attr;
 }

 - (NSMutableAttributedString *)getFailMsg:(NSString *)msg{
     NSMutableAttributedString *attr = [[NSMutableAttributedString alloc] initWithString:msg];
     attr.yy_font = [[PTVConfig instance] normalFont: ];
     attr.yy_color = MAKECOLOR(0x9B, 0x9B, 0x9B);
     attr.yy_lineSpacing = ;
     attr.yy_alignment = NSTextAlignmentCenter;
     return attr;
 }

 // 调用方式
 - (void)updateLabelText:(ToastMsgType)type errmsg:(NSString *)errmsg
 {
     NSMutableAttributedString *attri = [NSMutableAttributedString new];
     switch (type) {
         case :
             attri = [self getCardSuccMsgAttrStr];
             break;

         case :
             attri = [self getPrestigeSuccMsgAttrStr];
             break;

         case :
             attri = [self getFailMsg:errmsg];
             break;
     }
     // 设置内容
     self.subtitleLabel.textLayout = [self createTextLayout:attri];

     CGFloat labelHeight = [self heightOfInfoText:attri];

     [self mas_updateConstraints:^(MASConstraintMaker *make) {
         make.height.mas_equalTo(labelHeight);
     }];
 }

 // 创建 textLayout
 - (YYTextLayout*)createTextLayout:(NSMutableAttributedString *)attr
 {
     CGFloat maxWidth = subtitleMaxWidth  ;
     CGSize containerSize = CGSizeMake(maxWidth , CGFLOAT_MAX);
     YYTextLayout *layout = [YYTextLayout layoutWithContainerSize:containerSize text:attr];
     return layout;
 }

 // 高度往往有10个点的误差,需要比 YYLayout 计算的高度多10个点
 - (CGFloat)heightOfInfoText:(NSMutableAttributedString *)attr
 {
     YYTextLayout *layout = [self createTextLayout:attr];
     CGFloat infoHeight = layout.textBoundingSize.height + [self getTopBottomMargin]  ;
     return infoHeight;
 }

或者使用container的方式

     YYTextContainer *container = [YYTextContainer containerWithSize:containerSize];
     container.maximumNumberOfRows = ;
     container.truncationType = YYTextTruncationTypeEnd;
     YYTextLayout *layout = [YYTextLayout layoutWithContainer:container text:attrM];