UITextField占位符文本的多种字体大小 [英] Multiple font sizes for UITextField placeholder text

问题描述

我有一个占位符文本为我的UITextField，其中一部分应该有更大的字体大小，而不是占位符文本的其余部分。我可以使用attributPlaceHolder属性吗？它似乎不尊重我通过一个属性字符串添加的字体大小。

I have a placeholder text for my UITextField which one part should have larger font size rather than the rest of the placeholder text. Can I do this using attributedPlaceHolder property ? It does not seems to respect the font size I am adding through a attributed string.

目前我正在尝试一个字体大小，但似乎也不工作， / p>

Currently I am trying one font size , but it does not seems to work either ,

 NSAttributedString *placeholder =  [[NSAttributedString alloc] initWithString:placeholderText
                                                                               attributes:@{NSFontAttributeName : [UIFont fontWithName:textField.font.fontName size:8.0]}];
 textField.attributedPlaceholder = placeholder;

推荐答案

目前我不认为这是可能的 attributedPlaceHolder 。但是 setAttributedText 可以通过执行以下操作来实现：

Currently I don't think this is possible with attributedPlaceHolder. But with setAttributedText it is possible by doing the following

UIFont *futuraFont = [UIFont fontWithName:@"Futura" size:18.0];
NSDictionary *futuraDictionary = [NSDictionary dictionaryWithObject: futuraFont forKey:NSFontAttributeName];
NSMutableAttributedString *fAttrString = [[NSMutableAttributedString alloc] initWithString:title attributes: futuraDictionary];

UIFont *menloFont = [UIFont fontWithName:@"Menlo" size:12.0];
NSDictionary *menloDictionary = [NSDictionary dictionaryWithObject:menloFont forKey:NSFontAttributeName];
NSMutableAttributedString *mAttrString = [[NSMutableAttributedString alloc]initWithString:title2 attributes:menloDictionary];
[mAttrString addAttribute:NSForegroundColorAttributeName value:[UIColor blackColor] range:(NSMakeRange(0, [title2 length]))];

[fAttrString appendAttributedString:mAttrString];

UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 200, 320, 100)];
[textField setAllowsEditingTextAttributes:YES];
[textField setAttributedText:fAttrString];
[self.view addSubview:textField];

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