iOS开发 UITextFild/TextView限制字数(含联想词汇)

[self.nickNameFild addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];

- (void)textFieldDidChange:(UITextField *)textField{

if (textField.text.length > 20) {

textField.text = [textField.text substringToIndex:20];

}

}

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{

//只能输入20字的第一步

NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string];

if (toBeString.length > 20){

return NO;

}

return YES;

}

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text

{

if (range.location>=300)

{

//此处提示字数超限

returnNO;

}

else

{

return YES;

}

}