ios - 如何加粗 NSString 中一个字符的多个实例？

Question

我有一个类似下面的字符串:

NSString *a = @"* This is a text String \n * Followed by another text String \n * Followed by a third"

我需要将它打印成三行。现在，我希望其中的 Asterix 点加粗。所以我尝试了:

NSMutableAttributedString *att = [[NSMutableAttributedString alloc] initWithString:a];
[att addAddtribute:NSFontAttributeName value:SOMEBOLDFONT range:[a rangeOfString:@"*"]];

但这只会加粗第二个和第三个星号。我怎样才能把它们都加粗？

Answer 1

正如其他人所提到的，您需要遍历字符串以返回多个范围。这会起作用:

NSString *a = @"* This is a text String \n* Followed by another text String \n* Followed by a third";
NSMutableAttributedString *att = [[NSMutableAttributedString alloc] initWithString:a];
NSRange foundRange = [a rangeOfString:@"*"];

while (foundRange.location != NSNotFound)
{
    [att addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:20.0f] range:foundRange];

    NSRange rangeToSearch;
    rangeToSearch.location = foundRange.location + foundRange.length;
    rangeToSearch.length = a.length - rangeToSearch.location;
    foundRange = [a rangeOfString:@"*" options:0 range:rangeToSearch];
}

[[self textView] setAttributedText:att];