iOS - UITextField-不能输入空格

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

{

NSString*tem = [[stringcomponentsSeparatedByCharactersInSet:[NSCharacterSetwhitespaceCharacterSet]]componentsJoinedByString:@""];

if(![stringisEqualToString:tem]) {

return NO;

}

return YES;

}