iOS － NSAttributedString字符串属性详解

iOS开发过程中相信大家经常遇到当需要给字体，颜色，下划线等属性的时候参数是一个NSDictionary 字典

但是字典里面到底有哪些键值对了

我们把常用的总结一下

首先我们创建一个最简单的，设置一下字体和大小

我们使用是一个NSString 的方法

- (void)drawInRect:(CGRect)rect withAttributes:(NSDictionary *)attrs

来将一个字符串打印到view上

[objc] view plain copy

1. -(void)drawRect:(CGRect)rect  
2. {  
3.     self.backgroundColor=[UIColor whiteColor];  
4.     NSString *attrString =@"hello word";  
5.       
6.     NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30]  
7.                            }; //在词典中加入文本的字体 大小  
8.       
9.     [attrString drawInRect:CGRectMake(20,120,320,200)withAttributes:attrs];  
10. }  

置字体颜色

[objc] view plain copy

1. NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
2.                        NSForegroundColorAttributeName:[UIColor redColor]//文字颜色  
3.                        };  

效果

二，NSParagraphStyleAttributeName

段落格式

[objc] view plain copy

1. -(void)drawRect:(CGRect)rect  
2. {  
3.     NSString *attrString =@"hello word";  
4.       
5.     NSMutableParagraphStyle *paragraph=[[NSMutableParagraphStyle alloc]init];  
6.     paragraph.alignment=NSTextAlignmentCenter;//居中  
7.       
8.     NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
9.                            NSForegroundColorAttributeName:[UIColor redColor],//文字颜色  
10.                            NSParagraphStyleAttributeName:paragraph,//段落格式  
11.                            };  
12.       
13.     [attrString drawInRect:CGRectMake(20,120,320,200)withAttributes:attrs];  
14. }  

效果 ：（居中）

三，NSBackgroundColorAttributeName

背景色

[objc] view plain copy

1. NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
2.                           NSForegroundColorAttributeName:[UIColor redColor],//文字颜色  
3.                           NSParagraphStyleAttributeName:paragraph,//段落格式  
4.                           NSBackgroundColorAttributeName:[UIColor blueColor],//背景色  
5.                           };  

效果：

四，NSStrokeColorAttributeName

设置描边颜色，需要和NSStrokeWidthAttributeName 一起使用

[objc] view plain copy

1. NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
2.                        NSForegroundColorAttributeName:[UIColor redColor],//文字颜色  
3.                        NSParagraphStyleAttributeName:paragraph,//段落格式  
4.                        //NSBackgroundColorAttributeName:[UIColor blueColor],//背景色  
5.                        NSStrokeWidthAttributeName:@3, //描边宽度  
6.                        NSStrokeColorAttributeName:[UIColor greenColor],//设置 描边颜色，和NSStrokeWidthAttributeName配合使用,设置了这个NSForegroundColorAttributeName就失效了  
7.                        };  

效果：

五，NSStrikethroughStyleAttributeName

删除线

[objc] view plain copy

1. NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
2.                        NSForegroundColorAttributeName:[UIColor redColor],//文字颜色  
3.                        NSParagraphStyleAttributeName:paragraph,//段落格式  
4.                          NSBackgroundColorAttributeName:[UIColor blueColor],//背景色  
5.                        NSStrokeWidthAttributeName:@3, //描边宽度  
6.                        NSStrokeColorAttributeName:[UIColor greenColor],//设置 描边颜色，和NSStrokeWidthAttributeName配合使用,设置了这个NSForegroundColorAttributeName就失效了  
7.                       
8.                        NSStrikethroughStyleAttributeName:@1,//删除线，数字代表线条宽度  
9.                        };  

效果：

六，NSUnderlineStyleAttributeName

下划线

[objc] view plain copy

1.  NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
2.                            NSForegroundColorAttributeName:[UIColor redColor],//文字颜色  
3.                            NSParagraphStyleAttributeName:paragraph,//段落格式  
4. //                           NSBackgroundColorAttributeName:[UIColor blueColor],//背景色  
5.                            NSStrokeWidthAttributeName:@3, //描边宽度  
6.                            NSStrokeColorAttributeName:[UIColor greenColor],//设置 描边颜色，和NSStrokeWidthAttributeName配合使用,设置了这个NSForegroundColorAttributeName就失效了  
7.                           
8. //                           NSStrikethroughStyleAttributeName:@1,//删除线，数字代表线条宽度  
9.                            NSUnderlineStyleAttributeName:@(NSUnderlineStyleSingle),//下划线，值为一个枚举类型，大家可以分别试试  
10.                            };  

效果：

七，NSShadowAttributeName

设置阴影，他的对象是一个NSShadow的对象

[objc] view plain copy

1.     NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
2.                            NSForegroundColorAttributeName:[UIColor redColor],//文字颜色  
3.                            NSParagraphStyleAttributeName:paragraph,//段落格式  
4. //                           NSBackgroundColorAttributeName:[UIColor blueColor],//背景色  
5.                            NSStrokeWidthAttributeName:@3, //描边宽度  
6.                            NSStrokeColorAttributeName:[UIColor greenColor],//设置 描边颜色，和NSStrokeWidthAttributeName配合使用,设置了这个NSForegroundColorAttributeName就失效了  
7.                           
8. //                           NSStrikethroughStyleAttributeName:@1,//删除线，数字代表线条宽度  
9.                            NSUnderlineStyleAttributeName:@(NSUnderlineStyleSingle),//下划线，值为一个枚举类型，大家可以分别试试  
10.                            NSShadowAttributeName:shadow,//设置阴影，复制为一个NSShadow 的对象  
11.                              
12.                            };  

NSShadow

[objc] view plain copy

1. NSShadow *shadow=[[NSShadow alloc]init];  
2. shadow.shadowBlurRadius=5;//阴影的模糊程度  
3. shadow.shadowColor=[UIColor blueColor];//阴影颜色  
4. shadow.shadowOffset=CGSizeMake(6, 6);//阴影相对原来的偏移  

效果：

八，NSObliquenessAttributeName

倾斜

[objc] view plain copy

1.     NSDictionary* attrs =@{NSFontAttributeName:[UIFont fontWithName:@"AmericanTypewriter" size:30],//文本的颜色 字体 大小  
2.                            NSForegroundColorAttributeName:[UIColor redColor],//文字颜色  
3.                            NSParagraphStyleAttributeName:paragraph,//段落格式  
4. //                           NSBackgroundColorAttributeName:[UIColor blueColor],//背景色  
5.                            NSStrokeWidthAttributeName:@3, //描边宽度  
6.                            NSStrokeColorAttributeName:[UIColor greenColor],//设置 描边颜色，和NSStrokeWidthAttributeName配合使用,设置了这个NSForegroundColorAttributeName就失效了  
7.                           
8. //                           NSStrikethroughStyleAttributeName:@1,//删除线，数字代表线条宽度  
9.                            NSUnderlineStyleAttributeName:@(NSUnderlineStyleSingle),//下划线，值为一个枚举类型，大家可以分别试试  
10.                            NSShadowAttributeName:shadow,//设置阴影，复制为一个NSShadow 的对象  
11.                            NSObliquenessAttributeName:@1//倾斜程度  
12.                            };  

效果：