如何获取UITextView中一行的高度
如上图所示... lineHeight 是图像的高度橙色盒子。如何获取蓝色框的高度（即 lineHeight + 行距高度）？谢谢！
更新：我发现 lineHeight 的行为因内容中的字符而异。如果内容全部是英文，则 lineHeight 是正确的（例如，在默认 UITextView 中为 21）。但是，当内容与汉字混合时，UIFont lineHeight 仍报告为 21，而 self.textView.contentSize.height 则不同地增加：
English - adding 21 points for each line
Chinese - adding 24 points for each line
UPDATE (>sizeWithFont:)
CGSize constrainedRect = CGSizeMake(1000, 1000);
CGSize rectEnglish = [@"hello\nworld" sizeWithFont:self.textView.font constrainedToSize:constrainedRect lineBreakMode:UILineBreakModeWordWrap];
NSLog(@"width: %.2f height: %.2f", rectEnglish.width, rectEnglish.height);
CGSize rectChinese = [@"你\n好嗎" sizeWithFont:self.textView.font constrainedToSize:constrainedRect lineBreakMode:UILineBreakModeWordWrap];
NSLog(@"width: %.2f height: %.2f", rectChinese.width, rectChinese.height);
输出：
width: 41.00 height: 42.00
width: 34.00 height: 42.00
As shown in above diagram ... the lineHeight is the height of the orange box. How can I get the height of the blue box (i.e. lineHeight + line spacing height)? Thanks!
UPDATE: I found the the lineHeight behaves differently depends on the characters in content. If the content is all in English, the lineHeight is corrent (21, for example, in the default UITextView). However, when the content is mixed with Chinese characters, the UIFont lineHeight is still reported as 21 while the self.textView.contentSize.height is increased differently:
English - adding 21 points for each line
Chinese - adding 24 points for each line
UPDATE (sizeWithFont:)
CGSize constrainedRect = CGSizeMake(1000, 1000);
CGSize rectEnglish = [@"hello\nworld" sizeWithFont:self.textView.font constrainedToSize:constrainedRect lineBreakMode:UILineBreakModeWordWrap];
NSLog(@"width: %.2f height: %.2f", rectEnglish.width, rectEnglish.height);
CGSize rectChinese = [@"你\n好嗎" sizeWithFont:self.textView.font constrainedToSize:constrainedRect lineBreakMode:UILineBreakModeWordWrap];
NSLog(@"width: %.2f height: %.2f", rectChinese.width, rectChinese.height);
output:
width: 41.00 height: 42.00
width: 34.00 height: 42.00
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你必须使用
You have to use
尝试使用
NSStringUIKit< /code> 添加。-sizeWithFont:的一些变体应该是您所需要的。Try using the
NSStringUIKitadditions. Some variation of-sizeWithFont:should be what you need.