过滤掉一个UITextField中的字符

时间:2012-11-20 21:21:06

标签: iphone objective-c ios

好的,我正在尝试编辑这个文本字段,即txtCountry不接受某些字母,但我不能,因为txt国家/地区设置不正确。有人可以帮我解决这个问题。我可能会犯一些细节错误。

   - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
if ([textField isEqual: txtCountry]) {

NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:LEAGELNUM] invertedSet];
NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs]     componentsJoinedByString:@""];
BOOL basicTest = [string isEqualToString:filtered];
return basicTest;
}

}

1 个答案:

答案 0 :(得分:0)

您无需在方法中插入文本字段的名称。而是这样做:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    if ([textField isEqual: txtCountry]) {
        //return YES or NO here depending on your criteria
    }
}