Swift - for-in 循环 简述 for-in 循环遍历项目集合,例如数字范围、数组中的项目或字符串中的字符 - 句法 的语法 for-in Swift 4 编程语言中的循环是 - for index in var { statement(s) } 复制 Example var someInts:[Int] = [10, 20, 30] for index in someInts { print( "Value of index is \(index)") } 复制 执行上述代码时,会产生以下结果 - Value of index is 10 Value of index is 20 Value of index is 30 复制