#pragma mark - UITextFieldDelegate
- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string{
NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string]; if([toBeString containsString:@"."]) {
kMaxLength=8;
}else{
kMaxLength=5; }
UITextRange*selectedRange = [textField markedTextRange]; //获取高亮部分
UITextPosition*position = [textField positionFromPosition:selectedRange.startoffset:0]; // 没有高亮选择的字，则对已输入的文字进行字数统计和限制
if(!position) {
if(toBeString.length>kMaxLength&& range.length!=1){
textField.text= [toBeString substringToIndex:kMaxLength];
returnNO;
}
} // 有高亮选择的字符串，则暂不对文字进行统计和限制
else{}
if(string.length==0) {
returnYES; }
return [NSString isValid:toBeString];
return YES;
}
