如何在Swift中使用addAttribute

Question

我試圖添加鏈接到UITextViews，所以我遵循this post中的代碼。有關Objective-C的代碼是

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"This is an example by @marcelofabri_"]; 
[attributedString addAttribute:NSLinkAttributeName 
         value:@"username://marcelofabri_" 
         range:[[attributedString string] rangeOfString:@"@marcelofabri_"]]; 

但是當我嘗試這斯威夫特2作爲

var attributedString = NSMutableAttributedString(string: "This is an example by @marcelofabri_") 
attributedString.addAttribute(NSLinkAttributeName, value: "username://marcelofabri_", range: attributedString.string.rangeOfString("/marcelofabri_")) 

我得到的錯誤

不能援引 '的addAttribute' 與參數列表type'（String，value：String，range：Range？）'

我需要更改什麼é讓這個工作？

Answer 1

嘗試使用NSString尋找範圍，而不是斯威夫特String：

var attributedString = NSMutableAttributedString(string: "This is an example by @marcelofabri_") 
attributedString.addAttribute(NSLinkAttributeName, value: "username://marcelofabri_", range: (attributedString.string as NSString).rangeOfString("/marcelofabri_")) 

Answer 2

根據需要使用Range而不是NSRange。看一看：

NSRange from Swift Range?