xcode 如何在 UITextField 上设置字符限制
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时间：2020-09-14 20:53:20 来源:igfitidea点击:
How to put a character limit on a UITextField
提问by Blane Townsend
I would like to put a character limit on a UITextField but don't know how. I want it to have a maximum of 16 characters in it. How do I do this.
我想对 UITextField 设置字符限制，但不知道如何。我希望它最多包含 16 个字符。我该怎么做呢。
回答by DenverCoder9
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSUInteger newLength = [textField.text length] + [string length] - range.length;
return (newLength > 12) ? NO : YES;
}
