//UILabel 設(shè)置NSAttributedString
NSMutableParagraphStyle *ps = [[NSMutableParagraphStyle alloc] init];
[ps setAlignment:NSTextAlignmentCenter];
NSDictionary *attribs = @{NSFontAttributeName: [UIFont fontWithName:@"Microsoft Yahei" size:45],NSParagraphStyleAttributeName:ps};
NSMutableAttributedString *attributedText =[[NSMutableAttributedString alloc] initWithString:super.text
attributes:attribs];
super.attributedText = attributedText;
UITextView *lab = [LocalTexts objectAtIndex:j];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineHeightMultiple = 50.0f;
paragraphStyle.maximumLineHeight = 50.0f;
paragraphStyle.minimumLineHeight = 50.0f;
NSString *string = lab.text;
NSDictionary *ats = @{NSFontAttributeName : [UIFont fontWithName:@"DIN Medium" size:16.0f],NSParagraphStyleAttributeName : paragraphStyle, };
lab.attributedText = [[NSAttributedString alloc] initWithString:string attributes:ats];
//textview 設(shè)置行間距
NSString *const NSForegroundColorAttributeName;//值為UIColor,字體顏色,默認(rèn)為黑色。
NSString *const NSBackgroundColorAttributeName;//值為UIColor,字體背景色,默認(rèn)沒有。
NSString *const NSLigatureAttributeName;//值為整型NSNumber,連字屬性,一般中文用不到,在英文中可能出現(xiàn)相鄰字母連筆的情況。0為不連筆;1為默認(rèn)連筆,也是默認(rèn)值;2在ios 上不支持。
NSString *const NSKernAttributeName;//值為浮點(diǎn)數(shù)NSNumber,字距屬性,默認(rèn)值為0。
NSString *const NSStrikethroughStyleAttributeName;//值為整型NSNumber,可取值為
enum {
NSUnderlineStyleNone = 0×00,
NSUnderlineStyleSingle = 0×01,
};設(shè)置刪除線。
NSString *const NSUnderlineStyleAttributeName;//同上。設(shè)置下劃線。
NSString *const NSStrokeColorAttributeName;//值為UIColor,默認(rèn)值為nil,設(shè)置的屬性同F(xiàn)oregroundColor。
NSString *const NSStrokeWidthAttributeName;//值為浮點(diǎn)數(shù)NSNumber。設(shè)置比畫的粗細(xì)。
NSString *const NSShadowAttributeName;//值為NSShadow,設(shè)置比畫的陰影,默認(rèn)值為nil。
NSString *const NSVerticalGlyphFormAttributeName;//值為整型NSNumber,0為水平排版的字,1為垂直排版的字。
// initWithString:
NSAttributedString *attributedString_str = [[NSAttributedString alloc] initWithString:@"attributedString"];
NSLog(@"%@", attributedString_str);
// textView.attributedText = attributedString_str;
// initWithAttributedString:
NSAttributedString *attributedString_atts = [[NSAttributedString alloc] initWithAttributedString:attributedString_str];
NSLog(@"%@", attributedString_atts);
// textView.attributedText = attributedString_atts;
// initWithString:attributes:
UIColor *backgroundColor = [UIColor blackColor];
NSNumber *baseLineOffset = [NSNumber numberWithFloat:20.0];
UIColor *foregroundColor = [UIColor whiteColor];
NSNumber *kern = [NSNumber numberWithFloat:5.0];
NSNumber *ligature = [NSNumber numberWithFloat:3.0];
NSURL *linkURL = [NSURL URLWithString:@"http://www.baidu.com"];
NSNumber *underline = [NSNumber numberWithInt:NSUnderlineStyleSingle];
NSDictionary *attrsDic = @{NSForegroundColorAttributeName: foregroundColor,
NSBackgroundColorAttributeName: backgroundColor,
NSBaselineOffsetAttributeName: baseLineOffset,
NSKernAttributeName: kern,
NSLigatureAttributeName: ligature,
NSLinkAttributeName: linkURL,
NSUnderlineStyleAttributeName: underline
};
NSAttributedString *attributedString_str_atts = [[NSAttributedString alloc] initWithString:@"http://www.baidu.com" attributes:attrsDic];
NSLog(@"%@", attributedString_str_atts);
// textView.attributedText = attributedString_str_atts;
// initWithFileURL:options:documentAttributes:error:
NSURL *fileURL = nil;
fileURL = [[NSBundle mainBundle] URLForResource:@"Dynamic Coloring" withExtension:@"rtf"];
NSAttributedString *attributedString_fileURL = [[NSAttributedString alloc] initWithFileURL:fileURL options:@{} documentAttributes:nil error:nil];
NSLog(@"%@", attributedString_fileURL);
// textView.attributedText = attributedString_fileURL;
// initWithData:options:documentAttributes:error:
fileURL = nil;
fileURL = [[NSBundle mainBundle] URLForResource:@"View Layout" withExtension:@"rtf"];
NSData *data = [[NSData alloc] initWithContentsOfURL:fileURL];
NSAttributedString *attributedString_data = [[NSAttributedString alloc] initWithData:data options:@{} documentAttributes:nil error:nil];
NSLog(@"%@", attributedString_data);
// textView.attributedText = attributedString_data;
// initWithAttributedString:
NSMutableAttributedString *mutableAttributedString_attrs = [[NSMutableAttributedString alloc] initWithAttributedString:attributedString_fileURL];
由于NSAttributedString的屬性以字典的形式記錄,所以要弄清楚其中一些屬性對應(yīng)的鍵值:

NSBackgroundColorAttributeName:文字背景的顏色。
NSBaselineOffsetAttributeName:設(shè)置行距。
NSFontAttributeName:字體的樣式,必須設(shè)置NSFont作為Value,NSFont在iOS中不能使用,這個(gè)屬性的設(shè)置上我還不會(huì)。
NSForegroundColorAttributeName:文字顏色。
NSUnderlineStyleAttributeName:為文字添加下劃線。必須設(shè)置NSNumber對象為Value。如
NSNumber *underline = [NSNumber numberWithInt:NSUnderlineStyleSingle];
以上attribute在NSAttributedString和NSMutableAttributedString對象創(chuàng)建時(shí)可以設(shè)定,不同的是NSAttributedString對象在創(chuàng)建成功后其屬性便不可改變,而NSMutableAttributedString的屬性是可以改變的。如下所示:
[](https://code.csdn.net/snippets/84484/fork)
// Change NSMutableAttributedString
[mutableAttributedString_attrs beginEditing];
/*
// addAttributes:range:
[mutableAttributedString_attrs addAttributes:@{NSLinkAttributeName: @"www.baidu.com",
NSBackgroundColorAttributeName: [UIColor greenColor],
NSUnderlineStyleAttributeName: [NSNumber numberWithInt:NSUnderlineStyleDouble]
}
range:NSMakeRange(0, [attributedString_fileURL length])]; */
// addAttribute:value:range:
[mutableAttributedString_attrs addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleThick] range:NSMakeRange(0, 10)];
[mutableAttributedString_attrs addAttribute:NSBaselineOffsetAttributeName value:[NSNumber numberWithFloat:20.0] range:NSMakeRange(20, 100)];
[mutableAttributedString_attrs endEditing];
NSLog(@"%@", mutableAttributedString_attrs);
在修改文字屬性的開頭和結(jié)尾要分別調(diào)用beginEditing和endEditing方法,這些方法可以在文字屬性發(fā)生變化時(shí)發(fā)送消息給事件監(jiān)聽者。
可以為某個(gè)范圍內(nèi)的文字單個(gè)地添加屬性key-value對,也可以添加一個(gè)屬性字典。
注意到在控制臺(tái)輸出NSAttributedString或NSMutableAttributedString時(shí),輸出的不僅是字符內(nèi)容,還有對應(yīng)的屬性值:
2016-06-1 16:40:44.737 AttributedString_i7_Demo[43468:a0b] http://www.baidu.com{
NSBackgroundColor = "UIDeviceWhiteColorSpace 0 1";
NSBaselineOffset = 20;
NSColor = "UIDeviceWhiteColorSpace 1 1";
NSKern = 5;
NSLigature = 3;
NSLink = "http://www.baidu.com";
NSUnderline = 1;
}
也可以獲取某一段文字的屬性:
// get attribute
NSRange range = NSMakeRange(0, mutableAttributedString_attrs.length);
// attributesAtIndex:effectiveRange:
NSDictionary *dic = [mutableAttributedString_attrs attributesAtIndex:0 effectiveRange:&range];
NSLog(@"%@", [dic objectForKey:NSFontAttributeName]);
如果要將NSMutableAttributedString對象賦值給NSAttributedString時(shí),要使用copy方法:
textView.attributedText = [mutableAttributedString_attrs copy];
以上是對NSAttributedString和NSMutableAttributedString最基本的使用(主要還是NSAttributedString),為了強(qiáng)化作為NSMutableAttributedString的子類NSTextStorage處理文本的能力,明顯在這兩個(gè)類中增加了許多新的成員,如NSTextAttachment,在這里沒有用上,必須繼續(xù)深入學(xué)習(xí)。