1,十进制的字符串转成数字 Swift中,如果要把字符串转换成数字类型(比如整型,浮点型等).可以先转成NSString类型,让后再转. 1 2 3 4 //将文本框中的值转换成数字 var i = (tf1.text as NSString).intValue var f = (tf1.text as NSString).floatValue var d = (tf1.text as NSString).doubleValue 2,十六进制的字符串转成数字 (1)定义一个转换方法 1 2…
$str = "Mary Had A Little Lamb and She LOVED It So"; string strtolower ( string $str )— 将字符串转化为小写(所有字符) // 打印 mary had a little lamb and she loved it so 返回值:返回转换后的字符串 string strtoupper ( string $string )— 将字符串转化为大写(所有字符) 打印 MARY HAD A LITTLE LAM…
Swift中,如果要把字符串转换成数字类型(比如整型,浮点型等).可以先转成NSString类型,让后再转. 1 2 3 4 //将文本框中的值转换成数字 var i = (tf1.text as NSString).intValue var f = (tf1.text as NSString).floatValue var d = (tf1.text as NSString).doubleValue…