UILable文本属性设置

 NSMutableAttributedString *attributedString = [[NSMutableAttributedString
alloc] initWithString:@"NSAttributeString
可以用来设置字体、段落样式，字体颜色，字体背景颜色，可以添加删除线、下划线，可以设置字间距、阴影、空心字、斜体、扁平化"];
    [attributedString
addAttribute:NSExpansionAttributeName
value:@1
range:NSMakeRange(0,
17)];  //
扁平化
    [attributedString
addAttribute:NSObliquenessAttributeName
value:@1
range:NSMakeRange(18,
8)];//
倾斜
    
    
    //段落
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle
alloc] init];
    paragraphStyle.firstLineHeadIndent =
80;//
首行缩进
    paragraphStyle.headIndent =
25; //
其它行缩进
    paragraphStyle.lineSpacing =
20;   //
行间距
    [attributedString
addAttribute:NSParagraphStyleAttributeName
value:paragraphStyle range:NSMakeRange(0, attributedString.length)];//
段落
    
    NSShadow *shadow = [[NSShadow
alloc] init];
    shadow.shadowBlurRadius =
5; //模糊度
    shadow.shadowColor = [UIColor
redColor];
    shadow.shadowOffset =
CGSizeMake(1,
3);
    [attributedString
addAttribute:NSVerticalGlyphFormAttributeName
value:@(0)
range:NSMakeRange(27,
4)];
    [attributedString
addAttribute:NSShadowAttributeName
value:shadow range:NSMakeRange(27,
4)];
    [attributedString
addAttribute:NSStrokeWidthAttributeName
value:@(-3.0)
range:NSMakeRange(32,
11)];//
边线宽度
    [attributedString
addAttribute:NSStrokeColorAttributeName
value:[UIColor
greenColor] range:NSMakeRange(32,
11)];//边线颜色，需要先设置边线宽度
    [attributedString
addAttribute:NSStrikethroughStyleAttributeName
value:@(NSUnderlineStyleSingle)
range:NSMakeRange(44,
7)]; //
删除线
    [attributedStri
4000
ng
addAttribute:NSUnderlineStyleAttributeName
value:@(NSUnderlineStyleSingle)
range:NSMakeRange(52,
3)]; //
下划线
    
    [attributedString
setAttributes:@{NSFontAttributeName: [UIFont
fontWithName:@"Arial-BoldItalicMT"
size:18], 
NSKernAttributeName:@(10),NSForegroundColorAttributeName:[UIColor
redColor], NSBackgroundColorAttributeName:[UIColor
yellowColor]}
range:NSMakeRange(56,
20)];
    
    UILabel *label = [[UILabel
alloc] initWithFrame:CGRectMake(0,
0, self.view.bounds.size.width,
200)];
    label.numberOfLines =
0;
    label.backgroundColor = [UIColor
grayColor];
    label.attributedText = attributedString;
    [self.view
addSubview:label];

#pragma mark
顶上

- (void)alignTop;

/**
 *  改变行间距
 */
+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space;

/**
 *  改变字间距
 */
+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space;

/**
 *  改变行间距和字间距
 */
+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace;

- (void)alignTop {
    CGSize fontSize = [self.text
sizeWithFont:[UIFont
systemFontOfSize:19.0
weight:0.2]];
    
    double finalHeight = fontSize.height *
self.numberOfLines;
    double finalWidth =
self.frame.size.width;   
//expected width of label
    CGSize theStringSize = [self.text
sizeWithFont:[UIFont
systemFontOfSize:19.0
weight:0.2]
constrainedToSize:CGSizeMake(finalWidth, finalHeight)
lineBreakMode:self.lineBreakMode];
    int newLinesToPad = (finalHeight  - theStringSize.height) / fontSize.height;
    for(int i=0; i<newLinesToPad; i++)
        self.text = [self.text
stringByAppendingString:@"\n "];
}

+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space {
    
    NSString *labelText = label.text;
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString
alloc] initWithString:labelText];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle
alloc] init];
    [paragraphStyle setLineSpacing:space];
    [attributedString addAttribute:NSParagraphStyleAttributeName
value:paragraphStyle range:NSMakeRange(0, [labelText
length])];
    label.attributedText = attributedString;
    [label sizeToFit];
    
}

+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space {
    
    NSString *labelText = label.text;
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString
alloc] initWithString:labelText
attributes:@{NSKernAttributeName:@(space)}];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle
alloc] init];
    [attributedString addAttribute:NSParagraphStyleAttributeName
value:paragraphStyle range:NSMakeRange(0, [labelText
length])];
    label.attributedText = attributedString;
    [label sizeToFit];
    
}

+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace
{
    
    NSString *labelText = label.text;
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString
alloc] initWithString:labelText
attributes:@{NSKernAttributeName:@(wordSpace)}];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle
alloc] init];
    [paragraphStyle setLineSpacing:lineSpace];
    [attributedString addAttribute:NSParagraphStyleAttributeName
value:paragraphStyle range:NSMakeRange(0, [labelText
length])];
    label.attributedText = attributedString;
    [label sizeToFit];
    
}