如何在Swift连接字符串?
在Objective-C中
NSString *string = @"Swift";
NSString *resultStr = [string stringByAppendingString:@" is a new Programming Language"];
or
NSString *resultStr=[NSString stringWithFormat:@"%@ is a new Programming Language",string];
但我想用swift语言来写。
当前回答
let the_string = "Swift"
let resultString = "\(the_string) is a new Programming Language"
其他回答
这也会起作用:
var string = "swift"
var resultStr = string + " is a new Programming Language"
我刚从Objective-C切换到Swift(4)，我发现我经常使用:
let allWords = String(format:"%@ %@ %@",message.body!, message.subject!, message.senderName!)
它被称为字符串插值。 它是用常量，变量，字面量和表达式创建新字符串的方法。 例子:
let price = 3
let staringValue = "The price of \(price) mangoes is equal to \(price*price) "
也
let string1 = "anil"
let string2 = "gupta"
let fullName = string1 + string2 // fullName is equal to "anilgupta"
or
let fullName = "\(string1)\(string2)" // fullName is equal to "anilgupta"
它也意味着串联字符串值。
希望这对你有所帮助。
let the_string = "Swift"
let resultString = "\(the_string) is a new Programming Language"
你也可以在Swift中使用stringByAppendingFormat。
var finalString : NSString = NSString(string: "Hello")
finalString = finalString.stringByAppendingFormat("%@", " World")
print(finalString) //Output:- Hello World
finalString = finalString.stringByAppendingFormat("%@", " Of People")
print(finalString) //Output:- Hello World Of People
