如何連接NSAttributedStrings？

Question

我需要搜索一些字符串，並在合併字符串之前設置一些屬性，所以有NSStrings - >連接它們 - >使NSAttributedString不是一個選項，有沒有什麼辦法來連接屬性字符串到另一個屬性字符串？

Answer 1

我建議你使用一個可變屬性串一個@Linuxios建議，並且這裏有另一個例子：

NSMutableAttributedString *mutableAttString = [[NSMutableAttributedString alloc] init]; 

NSString *plainString = // ... 
NSDictionary *attributes = // ... a dictionary with your attributes. 
NSAttributedString *newAttString = [[NSAttributedString alloc] initWithString:plainString attributes:attributes]; 

[mutableAttString appendAttributedString:newAttString]; 

然而，只是爲了讓所有的選項在那裏，你可以着想還創建一個可變的歸屬字符串，由已包含輸入字符串的格式化的NSString構成。然後，您可以使用addAttributes: range:將事後的屬性添加到包含輸入字符串的範圍中。我推薦以前的方式。

Answer 2

試試這個：

NSMutableAttributedString* result = [astring1 mutableCopy]; 
[result appendAttributedString:astring2]; 

凡astring1和astring2是NSAttributedString秒。

Answer 3

如果您使用的CocoaPods，替代上述兩種答案，讓你避免在自己的代碼的可變性是使用優秀NSAttributedString+CCLFormat類別上NSAttributedString s表示可以讓你寫類似：

NSAttributedString *first = ...; 
NSAttributedString *second = ...; 
NSAttributedString *combined = [NSAttributedString attributedStringWithFormat:@"%@%@", first, second]; 

它當然只是使用NSMutableAttributedString。

它還有一個額外的優勢，就是它是一個完全成熟的格式化函數 - 所以它可以做的不僅僅是將字符串附加到一起。

Answer 4

如果您在使用雨燕，你可以重載+操作，這樣就可以以同樣的方式將它們連接起來您連接普通字符串：

// concatenate attributed strings 
func + (left: NSAttributedString, right: NSAttributedString) -> NSAttributedString 
{ 
    let result = NSMutableAttributedString() 
    result.append(left) 
    result.append(right) 
    return result 
} 

現在，你可以通過添加它們將它們連接起來：

let helloworld = NSAttributedString(string: "Hello ") + NSAttributedString(string: "World") 

Answer 5

// Immutable approach 
// class method 

+ (NSAttributedString *)stringByAppendingString:(NSAttributedString *)append toString:(NSAttributedString *)string { 
    NSMutableAttributedString *result = [string mutableCopy]; 
    [result appendAttributedString:append]; 
    NSAttributedString *copy = [result copy]; 
    return copy; 
} 

//Instance method 
- (NSAttributedString *)stringByAppendingString:(NSAttributedString *)append { 
    NSMutableAttributedString *result = [self mutableCopy]; 
    [result appendAttributedString:append]; 
    NSAttributedString *copy = [result copy]; 
    return copy; 
} 

Answer 6

您可以嘗試SwiftyFormat 它採用以下語法

let format = "#{{user}} mentioned you in a comment. #{{comment}}" 
let message = NSAttributedString(format: format, 
           attributes: commonAttributes, 
           mapping: ["user": attributedName, "comment": attributedComment]) 

Answer 7

斯威夫特3：只需創建一個NSMutableAttributedString和歸因字符串追加到他們。

let mutableAttributedString = NSMutableAttributedString() 

let boldAttribute = [ 
    NSFontAttributeName: UIFont(name: "GothamPro-Medium", size: 13)!, 
    NSForegroundColorAttributeName: Constants.defaultBlackColor 
] 

let regularAttribute = [ 
    NSFontAttributeName: UIFont(name: "Gotham Pro", size: 13)!, 
    NSForegroundColorAttributeName: Constants.defaultBlackColor 
] 

let boldAttributedString = NSAttributedString(string: "Warning: ", attributes: boldAttribute) 
let regularAttributedString = NSAttributedString(string: "All tasks within this project will be deleted. If you're sure you want to delete all tasks and this project, type DELETE to confirm.", attributes: regularAttribute) 
mutableAttributedString.append(boldAttributedString) 
mutableAttributedString.append(regularAttributedString) 

descriptionTextView.attributedText = mutableAttributedString