计算label自定义行间距字间距，计算自定义行间距字间距的高度

最新推荐文章于 2023-12-29 17:30:40 发布

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计算label自定义行间距字间距，计算自定义行间距字间距的高度

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本文介绍了一种在 iOS 开发中实现 UILabel 的文字视图高度自适应的方法，通过设置字体、段落样式等属性，使得文本能够根据内容自动调整其显示高度。

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-(CGFloat)getSpaceLabelHeight:(NSString *)str withFont:(UIFont *)font withWidth:(CGFloat)width {

NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStyle alloc] init];

paraStyle.lineBreakMode = NSLineBreakByCharWrapping;

paraStyle.alignment = NSTextAlignmentLeft;

paraStyle.lineSpacing = 4;

paraStyle.hyphenationFactor = 1.0;

paraStyle.firstLineHeadIndent = 0.0;

paraStyle.paragraphSpacingBefore = 0.0;

paraStyle.headIndent = 0;

paraStyle.tailIndent = 0;

NSDictionary *dic = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:paraStyle, NSKernAttributeName:@1.0f

};

CGSize size = [str boundingRectWithSize:CGSizeMake(width, 1000) options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil].size;

return size.height;

}

CGFloat heightText = [self getSpaceLabelHeight:articleStr withFont:[UIFont systemFontOfSize:16.0] withWidth:OcToWidth - 10];

UILabel *lable = [[UILabel alloc] initWithFrame:CGRectMake(5, boomHeight, OcToWidth - 10, heightText)];

lable.font = [UIFont systemFontOfSize:16.0];

lable.text = articleStr;

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:lable.text attributes:@{NSKernAttributeName : @(1.0f)}];

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

[paragraphStyle setLineSpacing:4];

[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, lable.text.length)];

[lable setAttributedText:attributedString];

lable.numberOfLines = 0;

[self.mainScrollview addSubview:lable];