UI-UILabel-attributedText-调研

最新推荐文章于 2024-07-04 21:37:54 发布

原创最新推荐文章于 2024-07-04 21:37:54 发布 · 714 阅读

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文章标签：

#UIFont #attributedTex #iOS #iPhone #UILabel

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本文介绍如何使用 iOS 中的 UILabel 控件，并通过 NSMutableAttributedString 设置复杂的文本格式，包括字体、颜色、段落样式等。

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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    

    /*
     1.控件 UIView UILabel UITextField UITextView UIButton
     2.字体、大小、单位、颜色
     */
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 300, 260)];
    [self.window addSubview:label];
    label.text = @"Label Text Content, This is a text label things attribute";/* 默认为空 */
    label.numberOfLines = 0;
    
    /* 文本的基本数据类型，属性字符串。以此为基础，如果这个设置了相应的属性，则会忽略上面设置的属性，默认为空 */
    NSString *string = label.text;
    NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:string];
    NSUInteger length = [string length];
   
    /* 段落样式 */
    NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    style.lineSpacing = 10;/* 设置行高 */
    style.headIndent = 10;/* 头部缩进 */
    style.lineHeightMultiple = 1.5;/* 行间距 */
    style.alignment = NSTextAlignmentLeft;/* 对齐方式 */
    style.firstLineHeadIndent = 20;/* 首行缩进 */
    style.paragraphSpacing = 20;/* 段落后面的间距 */
    style.paragraphSpacingBefore = 20;/* 段落前面的间距 */
    style.minimumLineHeight = 10;/* 最小行距 */
    style.maximumLineHeight = 30;/* 最大行距 */
    
    
    [attrString addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, length)];
    /* 设置字体 */
    UIFont *baseFont = [UIFont systemFontOfSize:25];
    [attrString addAttribute:NSFontAttributeName value:baseFont range:NSMakeRange(0, length)];/* 设置所有的字体 */
    UIFont *boldFont = [UIFont boldSystemFontOfSize:40];
    [attrString addAttribute:NSFontAttributeName value:boldFont range:[string rangeOfString:@"Text"]];/* 设置Text这四个字母的字体为粗体 */
    
    /* 设置颜色 */
    UIColor *color = [[UIColor alloc] initWithRed:127/255.0 green:1.0 blue:212/255.0 alpha:1.0];
    [attrString addAttribute:NSForegroundColorAttributeName value:color range:[string rangeOfString:@"Label"]];
    [attrString addAttribute:NSBackgroundColorAttributeName value:[UIColor yellowColor] range:[string rangeOfString:@"things"]];
    
    
    /* 设置字体 */
    [attrString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"AmericanTypewriter" size:18] range:[string rangeOfString:@"things"]];
    [attrString addAttribute:NSObliquenessAttributeName value:@"3" range:[string rangeOfString:@"is"]];
    
    
    /* 字符间距 */
    [attrString addAttribute:NSKernAttributeName value:@8 range:[string rangeOfString:@"attribute"]];
    
    /* 设置文字描边颜色, 宽度 */
    [attrString addAttribute:NSStrokeColorAttributeName value:[UIColor colorWithRed:138/255.0 green:43/255.0 blue:226/255.0 alpha:1.0] range:[string rangeOfString:@"attribute"]];
    [attrString addAttribute:NSStrokeWidthAttributeName value:@2 range:[string rangeOfString:@"attribute"]];
    
    /* 下划线 */
    [attrString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleDouble) range:[string rangeOfString:@"Content"]];
    [attrString addAttribute:NSUnderlineColorAttributeName value:[UIColor greenColor] range:[string rangeOfString:@"Content"]];
    
    [attrString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleThick) range:[string rangeOfString:@"This"]];/* 厚的 */
    
    /* 删除线 */
    [attrString addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlineStyleThick) range:[string rangeOfString:@"label"]];
    [attrString addAttribute:NSStrikethroughColorAttributeName value:[UIColor redColor] range:[string rangeOfString:@"label"]];
    
    label.attributedText = attrString;
    
    label.highlightedTextColor = [UIColor redColor];
    label.highlighted = NO;
    label.enabled = YES;

    
    [attrString release];
    [label release];
    [_window release];
    return YES;
}

效果如⬇️