Swift: UITextfield 只能输入数字或字母,限制长度
1 设置代理继承UITextFieldDelegate
tfTime.delegate =self; tfCMD.delegate =self; 2 实现代理
func textField(textField:UITextField,shouldChangeCharactersInRange range:NSRange,replacementString string: String) -> Bool { iftfTime == textField { //限制只能输入数字,不能输入特殊字符 let length = string.lengthOfBytesUsingEncoding(NSUTF8StringEncoding) for loopIndexin0..<length { let char = (stringas NSString).characterAtIndex(loopIndex) if char <48 {return false } if char >57 {return false } } //限制长度 let proposeLength = (textField.text?.lengthOfBytesUsingEncoding(NSUTF8StringEncoding))! - range.length + string.lengthOfBytesUsingEncoding(NSUTF8StringEncoding) if proposeLength >4 { return false } } iftfCMD == textField { let length = string.lengthOfBytesUsingEncoding(NSUTF8StringEncoding) for loopIndexin0..<length { let char = (stringas NSString).characterAtIndex(loopIndex)
//只能输入 a~z A~Z if char <65 {return false } if char >=91 && char <=112 {returnfalse } if char >=123 {returnfalse } }
} return true } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |