IOS textField怎样设置只能输入英文字母或者数字，不能输入汉字
最新回答
游戏人间
2024-10-31 02:39:21
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSCharacterSet *cs;
cs = [[NSCharacterSet characterSetWithCharactersInString:kAlphaNum] invertedSet];
NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""]; //按cs分离出数组,数组按@""分离出
字符串
BOOL canChange = [string isEqualToString:filtered];
return self.textField.text.length>=5?NO: canChange;
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