如何使用 NSAttributedString Objective-c 在字符串的一部分下划线 [英] How to underline part of string with NSAttributedString objective-c

问题描述

仅当范围从零开始时才对字符串进行下划.如果我从 1 开始，那么它就起作用了.无论如何，绿色都有效.

Underling a string only works when the range starts from zero. If i start it at 1 then it works. The green colour works regardless.

+ (NSAttributedString*)returnNSAttributedString:(NSString*)string range:(NSRange)range WithColour:(UIColor*)colour WithUnderLine:(BOOL)underline {
    NSMutableAttributedString *attributedString =
    [[NSMutableAttributedString alloc] initWithString:string];
    if (underline) {
        [attributedString addAttributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)} range:range];
    }
    [attributedString addAttribute:NSForegroundColorAttributeName value:colour range:range];
    [attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSRangeFromString(string)];
    return attributedString;
}

它适用于 iOS 7 而不是 iOS 8.

it works on iOS 7 not iOS 8.

推荐答案

您可以使用 NSUnderlineStyleAttributeName 和 NSUnderlineColorAttributeName 属性.你可以这样使用它:

You can use the NSUnderlineStyleAttributeName and NSUnderlineColorAttributeName attributes. You can use it like this:

NSRange foundRange = [wordString rangeOfString:@"Base Mix"];
if (foundRange.location != NSNotFound)
{
    [wordString beginEditing];
    [wordString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:1] range:foundRange];
    [wordString addAttribute:NSUnderlineColorAttributeName value:[NSColor redColor] range:foundRange];
    [wordString endEditing];
}

这篇关于如何使用 NSAttributedString Objective-c 在字符串的一部分下划线的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！