iOS6之后 NSAttributedString 福利
@于iOS6之前，需要使用NSMutableAttributedString当你需要导入：CoreText.framework框架的。但在iOS6 之后就不在须要了.
- (void)testOfNSMutableAttributedStringAndNSAttributedString
{
/**
* - (void)addAttribute:(NSString *)name value:(id)value range:(NSRange)range;
* 主要方法
* name 属性名
* value 属性相应效果的值
* range 效果所映射的范围
*/
#pragma mark 測试数据0
NSString *testString = @"NSMutableAttributed---0";
UILabel *testLabel = [[UILabel alloc] initWithFrame:CGRectMake(60, 100, 200, 40)];
NSMutableAttributedString * testAttriString = [[NSMutableAttributedString alloc] initWithString:testString];
// 加入删除线
[testAttriString addAttribute:NSStrikethroughStyleAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleSingle] range:NSMakeRange(0, testAttriString.length)];
// 加入下划线
[testAttriString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleSingle] range:NSMakeRange(0, testAttriString.length)];
// 设置文本的字体以及大小
[testAttriString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Helvetica-Bold" size:15] range:NSMakeRange(0, testAttriString.length)];
// 设置笔画的粗细
[testAttriString addAttribute:NSStrokeWidthAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleDouble] range:NSMakeRange(0, testAttriString.length)];
// label的背景颜色
[testAttriString addAttribute:NSBackgroundColorAttributeName value:[UIColor yellowColor] range:NSMakeRange(0, testAttriString.length)];
// 眼下没測出什么效果.....
[testAttriString addAttribute:NSVerticalGlyphFormAttributeName value:[NSNumber numberWithInt:1] range:NSMakeRange(0, testAttriString.length)];
// label上文本颜色(也会影响删除线和下划线的颜色)
[testAttriString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, testAttriString.length)];
testLabel.attributedText = testAttriString;
#pragma mark 測试数据1
NSString *testString1 = @"NSMutableAttributed---1";
UILabel *testLabel1 = [[UILabel alloc] initWithFrame:CGRectMake(60, 200, 200, 40)];
NSMutableAttributedString * testAttriString1 = [[NSMutableAttributedString alloc] initWithString:testString1];
// 实现文本内容颜色和下划线,删除线的颜色不一样
// NSStrokeColorAttributeName 单独设置没有效果
// 必须与NSStrokeWidthAttributeName一起设置
[testAttriString1 addAttribute:NSStrikethroughStyleAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleSingle] range:NSMakeRange(0, testAttriString1.length)];
[testAttriString1 addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, testAttriString1.length)];
[testAttriString1 addAttribute:NSStrokeColorAttributeName value:[UIColor cyanColor] range:NSMakeRange(0, testAttriString1.length)];
[testAttriString1 addAttribute:NSStrokeWidthAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleDouble] range:NSMakeRange(0, testAttriString1.length)];
testLabel1.attributedText = testAttriString1;
#pragma mark 測试数据2
NSString *testString2 = @"NSMutableAttributed---2";
UILabel *testLabel2= [[UILabel alloc] initWithFrame:CGRectMake(60, 300, 200, 40)];
NSMutableAttributedString * testAttriString2 = [[NSMutableAttributedString alloc] initWithString:testString2];
// 笔画的阴影效果
NSShadow *shadow = [[NSShadow alloc] init];
[shadow setShadowColor:[UIColor colorWithRed:0.053 green:0.088 blue:0.205 alpha:1.000]];
[shadow setShadowBlurRadius:4.0];
[shadow setShadowOffset:CGSizeMake(2, 2)];
[testAttriString2 addAttribute:NSShadowAttributeName value:shadow range:NSMakeRange(0, [testAttriString2 length])];
testLabel2.backgroundColor = [UIColor clearColor];
testLabel2.attributedText = testAttriString2;
[self.view addSubview:testLabel];
[self.view addSubview:testLabel1];
[self.view addSubview:testLabel2];
}
使用AttributedString的方式通常有两种：
方式一：
首先初始化一个NSMutableAttributedString。然后向里面加入文字样式，最后将它赋给控件的AttributedText，该方法适合于文本较少而又须要分段精细控制的情况。
NSString *originStr = @"Hello,中秋节。";
//方式一
//创建 NSMutableAttributedString
NSMutableAttributedString *attributedStr01 = [[NSMutableAttributedString alloc] initWithString: originStr];
//加入属性
//给全部字符设置字体为Zapfino，字体高度为15像素
[attributedStr01 addAttribute: NSFontAttributeName value: [UIFont fontWithName: @"Zapfino" size: 15]
range: NSMakeRange(0, originStr.length)];
//分段控制，最開始4个字符颜色设置成蓝色
[attributedStr01 addAttribute: NSForegroundColorAttributeName value: [UIColor blueColor] range: NSMakeRange(0, 4)];
//分段控制。第5个字符開始的3个字符。即第5、6、7字符设置为红色
[attributedStr01 addAttribute: NSForegroundColorAttributeName value: [UIColor redColor] range: NSMakeRange(4, 3)];
//赋值给显示控件label01的 attributedText
_label01.attributedText = attributedStr01;
方式二：
首先创建属性字典，初始化各种属性。然后和须要控制的文本一起创建并赋值给控件的AttributedText，该方法适合于须要控制的文本较多总体控制的情况，一般是从文件里读取的大段文本控制。
//方式二
//创建属性字典
NSDictionary *attrDict = @{ NSFontAttributeName: [UIFont fontWithName: @"Zapfino" size: 15],
NSForegroundColorAttributeName: [UIColor blueColor] };
//创建 NSAttributedString 并赋值
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict];
通过对照两个样例能够看出。方式一比較easy处理复杂的格式。可是属性设置比較繁多复杂，而方式二的属性设置比較简单明了，却不善于处理复杂多样的格式控制，可是不善于并不等于不能。能够通过属性字符串分段的方式来达到方式一的效果。例如以下：
//方式二的分段处理
//第一段
NSDictionary *attrDict1 = @{ NSFontAttributeName: [UIFont fontWithName: @"Zapfino" size: 15],
NSForegroundColorAttributeName: [UIColor blueColor] };
NSAttributedString *attrStr1 = [[NSAttributedString alloc] initWithString: [originStr substringWithRange: NSMakeRange(0, 4)] attributes: attrDict1];
//第二段
NSDictionary *attrDict2 = @{ NSFontAttributeName: [UIFont fontWithName: @"Zapfino" size: 15],
NSForegroundColorAttributeName: [UIColor redColor] };
NSAttributedString *attrStr2 = [[NSAttributedString alloc] initWithString: [originStr substringWithRange: NSMakeRange(4, 3)] attributes: attrDict2];
//第三段
NSDictionary *attrDict3 = @{ NSFontAttributeName: [UIFont fontWithName: @"Zapfino" size: 15],
NSForegroundColorAttributeName: [UIColor blackColor] };
NSAttributedString *attrStr3 = [[NSAttributedString alloc] initWithString: [originStr substringWithRange:
NSMakeRange(7, originStr.length - 4 - 3)] attributes: attrDict3];
//合并
NSMutableAttributedString *attributedStr03 = [[NSMutableAttributedString alloc] initWithAttributedString: attrStr1];
[attributedStr03 appendAttributedString: attrStr2];
[attributedStr03 appendAttributedString: attrStr3];
_label03.attributedText = attributedStr03;
@AttributedString到底能够设置哪些属性，详细来说。有以下21个：
// NSFontAttributeName 设置字体属性，默认值：字体：Helvetica(Neue) 字号：12
// NSForegroundColorAttributeNam 设置字体颜色，取值为 UIColor对象，默认值为黑色
// NSBackgroundColorAttributeName 设置字体所在区域背景颜色。取值为 UIColor对象，默认值为nil, 透明色
// NSLigatureAttributeName 设置连体属性，取值为NSNumber 对象(整数)。0 表示没有连体字符，1 表示使用默认的连体字符
// NSKernAttributeName 设定字符间距，取值为 NSNumber 对象（整数）。正值间距加宽，负值间距变窄
// NSStrikethroughStyleAttributeName 设置删除线，取值为 NSNumber 对象（整数）
// NSStrikethroughColorAttributeName 设置删除线颜色。取值为 UIColor 对象，默认值为黑色
// NSUnderlineStyleAttributeName 设置下划线，取值为 NSNumber 对象（整数）。枚举常量 NSUnderlineStyle中的值，与删除线相似
// NSUnderlineColorAttributeName 设置下划线颜色，取值为 UIColor 对象，默认值为黑色
// NSStrokeWidthAttributeName 设置笔画宽度，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
// NSShadowAttributeName 设置阴影属性，取值为 NSShadow 对象
// NSTextEffectAttributeName 设置文本特殊效果，取值为 NSString 对象，眼下仅仅有图版印刷效果可用：
// NSBaselineOffsetAttributeName 设置基线偏移值，取值为 NSNumber （float）,正值上偏。负值下偏
// NSObliquenessAttributeName 设置字形倾斜度，取值为 NSNumber （float）,正值右倾。负值左倾
// NSExpansionAttributeName 设置文本横向拉伸属性，取值为 NSNumber （float）,正值横向拉伸文本，负值横向压缩文本
// NSWritingDirectionAttributeName 设置文字书写方向，从左向右书写或者从右向左书写
// NSVerticalGlyphFormAttributeName 设置文字排版方向，取值为 NSNumber 对象(整数)，0 表示横排文本，1 表示竖排文本
// NSLinkAttributeName 设置链接属性，点击后调用浏览器打开指定URL地址
// NSAttachmentAttributeName 设置文本附件,取值为NSTextAttachment对象,经常使用于文字图片混排
// NSParagraphStyleAttributeName 设置文本段落排版格式，取值为 NSParagraphStyle 对象
以下就一一举例说明：
1. NSFontAttributeName
//NSForegroundColorAttributeName 设置字体颜色，取值为 UIColor，默觉得黑色
NSDictionary *attrDict1 = @{ NSForegroundColorAttributeName: [UIColor redColor] };
NSDictionary *attrDict2 = @{ NSForegroundColorAttributeName: [UIColor blueColor] };
NSDictionary *attrDict3 = @{ NSForegroundColorAttributeName: [UIColor orangeColor] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
注意：
NSForegroundColorAttributeName设置的颜色与UILabel的textColor属性设置的颜色在地位上是相等的。谁最后赋值。终于显示的就是谁的颜色。
2. NSBackgroundColorAttributeName
//NSForegroundColorAttributeName 设置字体颜色。取值为 UIColor。默觉得黑色
NSDictionary *attrDict1 = @{ NSForegroundColorAttributeName: [UIColor redColor] };
NSDictionary *attrDict2 = @{ NSForegroundColorAttributeName: [UIColor blueColor] };
NSDictionary *attrDict3 = @{ NSForegroundColorAttributeName: [UIColor orangeColor] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
//NSBackgroundColorAttributeName 设置字体所在区域背景的颜色，取值为UIColor。默认值为nil
NSDictionary *attrDict4 = @{ NSBackgroundColorAttributeName: [UIColor orangeColor] };
NSDictionary *attrDict5 = @{ NSBackgroundColorAttributeName: [UIColor redColor] };
NSDictionary *attrDict6 = @{ NSBackgroundColorAttributeName: [UIColor cyanColor] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict4];
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict5];
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict6];
细致观察会发现个问题。我并没有关闭 NSForegroundColorAttributeName 属性，可是在执行结果中，全部字体的颜色都变成了默认色——黑色。这说明 NSForegroundColorAttributeName 和 NSBackgroundColorAttributeName 的低位是相等的，跟前面介绍的 textColor 一样。哪个属性最后一次赋值。就会冲掉前面的效果，若是我们把属性代码顺序交换一下
//NSBackgroundColorAttributeName 设置字体所在区域背景的颜色，取值为UIColor。默认值为nil
NSDictionary *attrDict4 = @{ NSBackgroundColorAttributeName: [UIColor orangeColor] };
NSDictionary *attrDict5 = @{ NSBackgroundColorAttributeName: [UIColor redColor] };
NSDictionary *attrDict6 = @{ NSBackgroundColorAttributeName: [UIColor cyanColor] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict4];
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict5];
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict6];
//NSForegroundColorAttributeName 设置字体颜色，取值为 UIColor，默觉得黑色
NSDictionary *attrDict1 = @{ NSForegroundColorAttributeName: [UIColor redColor] };
NSDictionary *attrDict2 = @{ NSForegroundColorAttributeName: [UIColor blueColor] };
NSDictionary *attrDict3 = @{ NSForegroundColorAttributeName: [UIColor orangeColor] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
可是textColor属性能够与 NSBackgroundColorAttributeName 属性叠加
_label01.textColor = [UIColor greenColor];
_label02.textColor = [UIColor yellowColor];
_label03.textColor = [UIColor blueColor];
//NSForegroundColorAttributeName 设置字体颜色，取值为 UIColor，默觉得黑色
NSDictionary *attrDict1 = @{ NSForegroundColorAttributeName: [UIColor redColor] };
NSDictionary *attrDict2 = @{ NSForegroundColorAttributeName: [UIColor blueColor] };
NSDictionary *attrDict3 = @{ NSForegroundColorAttributeName: [UIColor orangeColor] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
//NSBackgroundColorAttributeName 设置字体所在区域背景的颜色，取值为UIColor。默认值为nil
NSDictionary *attrDict4 = @{ NSBackgroundColorAttributeName: [UIColor orangeColor] };
NSDictionary *attrDict5 = @{ NSBackgroundColorAttributeName: [UIColor redColor] };
NSDictionary *attrDict6 = @{ NSBackgroundColorAttributeName: [UIColor cyanColor] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict4];
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict5];
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict6];
尽管 textColor 在 NSFontAttributeName 之前赋值，可是因为 NSFontAttributeName 的属性效果被NSBackgroundColorAttributeName 属性冲掉了。所以终于显示了 textColor 的颜色。
3. NSLigatureAttributeName
//NSLigatureAttributeName 设置连体属性，取值为NSNumber 对象(整数)。0 表示没有连体字符。1 表示使用默认的连体字符，
// 2 表示使用全部连体符号，默认值为 1（iOS 不支持 2）
NSString *ligatureStr = @"flush";
NSDictionary *attrDict1 = @{ NSLigatureAttributeName: [NSNumber numberWithInt: 0],
NSFontAttributeName: [UIFont fontWithName: @"futura" size: 30] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: ligatureStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSLigatureAttributeName: @(1),
NSFontAttributeName: [UIFont fontWithName: @"futura" size: 30]
};
_label02.attributedText = [[NSAttributedString alloc] initWithString: ligatureStr attributes: attrDict2];
因为要展示连体字符。所以将前面使用的带有中文的字符串换成 flush
NSLigatureAttributeName的取值为NSNumber对象，所以不能直接将一个整数值赋给它，创建 NSNumber 对象的方法有非常多，或者能够简写成 @(int)
注意观察字母f和l之间的变化。
感觉连写就是一个艺术字功能，当字符f和l组合使用组合符号（所谓的字形(glyph)）绘制时，看起来确实更加美观。可是并不是全部的字符之间都有组合符号。其实，仅仅有某些字体中得某些字符的组合（如字符f和l。字符f和i等）才具有美观的组合符号。
4. NSKernAttributeName
//NSKernAttributeName 设定字符间距，取值为 NSNumber 对象（整数），正值间距加宽。负值间距变窄
NSDictionary *attrDict1 = @{ NSKernAttributeName: @(-3),
NSFontAttributeName: [UIFont systemFontOfSize: 20]
};
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSKernAttributeName: @(0),
NSFontAttributeName: [UIFont systemFontOfSize: 20]
};
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSKernAttributeName: @(10),
NSFontAttributeName: [UIFont systemFontOfSize: 20]
};
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
5. NSStrikethroughStyleAttributeName
//NSStrikethroughStyleAttributeName 设置删除线。取值为 NSNumber 对象（整数）。枚举常量 NSUnderlineStyle中的值
// NSUnderlineStyleNone 不设置删除线
// NSUnderlineStyleSingle 设置删除线为细单实线
// NSUnderlineStyleThick 设置删除线为粗单实线
// NSUnderlineStyleDouble 设置删除线为细双实线
NSDictionary *attrDict1 = @{ NSStrikethroughStyleAttributeName: @(NSUnderlineStyleSingle),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSStrikethroughStyleAttributeName: @(NSUnderlineStyleThick),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSStrikethroughStyleAttributeName: @(NSUnderlineStyleDouble),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
注意：
尽管使用了枚举常量，可是枚举常量的本质仍为整数。所以相同必须先转化为 NSNumber 才干使用
删除线和下划线使用相同的枚举常量作为其属性值
眼下iOS中仅仅有上面列出的4中效果，尽管我们能够在头文件里发现其它很多其它的取值。可是使用后没有不论什么效果
能够看出，中文和英文删除线的位置有所不同
另外。删除线属性取值除了上面的4种外，其实还能够取其它整数值，有兴趣的能够自行试验，取值为 0 - 7时，效果为单实线，随着值得添加，单实线逐渐变粗。取值为 9 - 15时。效果为双实线。取值越大，双实线越粗。
NSDictionary *attrDict1 = @{ NSStrikethroughStyleAttributeName: @(1),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSStrikethroughStyleAttributeName: @(3),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSStrikethroughStyleAttributeName: @(7),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
6. NSStrikethroughColorAttributeName
//NSStrikethroughColorAttributeName 设置删除线颜色，取值为 UIColor 对象，默认值为黑色
NSDictionary *attrDict1 = @{ NSStrikethroughColorAttributeName: [UIColor blueColor],
NSStrikethroughStyleAttributeName: @(1),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSStrikethroughColorAttributeName: [UIColor orangeColor],
NSStrikethroughStyleAttributeName: @(3),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSStrikethroughColorAttributeName: [UIColor greenColor],
NSStrikethroughStyleAttributeName: @(7),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
7. NSUnderlineStyleAttributeName
下划线除了线条位置和删除线不同外，其它的都能够全然參照删除线设置。
//NSUnderlineStyleAttributeName 设置下划线，取值为 NSNumber 对象（整数）。枚举常量 NSUnderlineStyle中的值，与删除线相似
NSDictionary *attrDict1 = @{ NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSUnderlineStyleAttributeName: @(NSUnderlineStyleThick),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSUnderlineStyleAttributeName: @(NSUnderlineStyleDouble),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
8. NSUnderlineColorAttributeName
能够全然參照下划线颜色设置
//NSUnderlineColorAttributeName 设置下划线颜色，取值为 UIColor 对象。默认值为黑色
NSDictionary *attrDict1 = @{ NSUnderlineColorAttributeName: [UIColor blueColor],
NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSUnderlineColorAttributeName: [UIColor orangeColor],
NSUnderlineStyleAttributeName: @(NSUnderlineStyleThick),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSUnderlineColorAttributeName: [UIColor greenColor],
NSUnderlineStyleAttributeName: @(NSUnderlineStyleDouble),
NSFontAttributeName: [UIFont systemFontOfSize:20] };
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
9. NSStrokeWidthAttributeName
//NSStrokeWidthAttributeName 设置笔画宽度，取值为 NSNumber 对象（整数）。负值填充效果，正值中空效果
NSDictionary *attrDict1 = @{ NSStrokeWidthAttributeName: @(-3),
NSFontAttributeName: [UIFont systemFontOfSize:30] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSStrokeWidthAttributeName: @(0),
NSFontAttributeName: [UIFont systemFontOfSize:30] };
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSStrokeWidthAttributeName: @(3),
NSFontAttributeName: [UIFont systemFontOfSize:30] };
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
10. NSStrokeColorAttributeName
//NSStrokeColorAttributeName 填充部分颜色，不是字体颜色，取值为 UIColor 对象
NSDictionary *attrDict1 = @{ NSStrokeWidthAttributeName: @(-3),
NSStrokeColorAttributeName: [UIColor orangeColor],
NSFontAttributeName: [UIFont systemFontOfSize:30] };
_label01.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict1];
NSDictionary *attrDict2 = @{ NSStrokeWidthAttributeName: @(0),
NSStrokeColorAttributeName: [UIColor blueColor],
NSFontAttributeName: [UIFont systemFontOfSize:30] };
_label02.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict2];
NSDictionary *attrDict3 = @{ NSStrokeWidthAttributeName: @(3),
NSStrokeColorAttributeName: [UIColor greenColor],
NSFontAttributeName: [UIFont systemFontOfSize:30] };
_label03.attributedText = [[NSAttributedString alloc] initWithString: originStr attributes: attrDict3];
版权声明：本文博主原创文章，博客，未经同意不得转载。
