在UITextView上设置NSAttributedString上的字体忽略行间距 [英] Setting font on NSAttributedString on UITextView disregards line spacing

问题描述

我正在尝试将属性字符串设置为iOS 6中的UITextView。问题是，如果我尝试在属性字符串上设置font属性，则会忽略行间距。但是，如果我没有设置字体，并使用默认字体，则行间距有效。

I'm trying to set an attributed string to a UITextView in iOS 6. The problem is, if I attempt to set the font property on the attributed string, the line spacing is ignored. However, if I don't set the font, and the default font is used, then line spacing works.

NSString *string = @" Hello \n world";
attrString = [[NSMutableAttributedString alloc] initWithString:string];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];

paragraphStyle.minimumLineHeight = 50;
// setting the font below makes line spacing become ignored
[attrString addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:20] range:NSMakeRange(0, string.length)];
[attrString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, string.length)];

mainTextView.attributedText = attrString;

知道发生了什么事吗？

推荐答案

Attributed字符串编程指南：

UIFont *font = [UIFont fontWithName:@"Palatino-Roman" size:14.0];
NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObject:font
                                forKey:NSFontAttributeName];
NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:@"strigil" attributes:attrsDictionary];

更新：我尝试使用 addAttribute：在我自己的应用程序中的方法，但它似乎无法在iOS 6模拟器上工作：

Update: I tried to use addAttribute: method in my own app, but it seemed to be not working on the iOS 6 Simulator:

NSLog（@％@，textView。 attributedText）;

日志似乎显示正确添加的属性，但iOS模拟器上的视图未显示属性。

The log seems to show correctly added attributes, but the view on iOS simulator was not display with attributes.

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