测试字符串斯威夫特

Question

双引号字符我想找到双引号字符用下面的代码迅速字符串类型：

for char in string { 
    if char == "\"" { 
     debugPrint("I have found a double quote") 
    } 
} 

if语句从未捕捉字符串中的双引号。

我正在使用Xcode 7.3.1

任何建议的意见？

Answer 1

我不认为代码应该编译？ （假设string确实是一个字符串。）

试试这个。似乎为我（同一版本的Xcode）工作：

for char in string.characters { 
    if char == "\"" { 
     print("I have found a double quote") 
    } 
} 

Answer 2

取决于你想要做什么：

let str = "Hello \"World\"" 

// If you simply want to know if the string has a double quote 
if str.containsString("\"") { 
    print("String contains a double quote") 
} 

// If you want to know index of the first double quote 
if let range = str.rangeOfString("\"") { 
    print("Found double quote at", range.startIndex) 
} 

// If you want to know the indexes of all double quotes 
let indexes = str.characters.enumerate() 
       .filter { $1 == "\"" } 
       .map { $0.0 } 
print(indexes)