UITextField限制字符篇幅
UITextField限制字符字数
[self.username_tf addTarget:self action:@selector(textEditingChanged:) forControlEvents:UIControlEventEditingChanged];
[self.password_tf addTarget:self action:@selector(textEditingChanged:) forControlEvents:UIControlEventEditingChanged];
-(void)textEditingChanged:(UITextField *)textField
{
if (textField == self.username_tf) {
if ([textField.text length]>20) {
textField.text=[textField.text substringToIndex:20];
// [iToast makeText:@"用户名长度不应该超过20个字符"];
}
}else if (textField == self.password_tf||textField == self.repassword_tf) {
if ([textField.text length]>15) {
textField.text=[textField.text substringToIndex:15];
}
}
}