NSInteger length;
-(void)textFiledEditChanged:(NSNotification*)obj{
UITextField *textField = (UITextField *)obj.object;
NSString *toBeString = textField.text;
DSLog(@" ----toBeString----- %@",toBeString);
NSInteger length = [ self getStringLengthWithString : toBeString];
DSLog ( @"-------- character length -------%ld" ,( long )length);
NSString *lang = [[ UITextInputMode currentInputMode ] primaryLanguage ]; // Keyboard input mode
if ([lang isEqualToString : @"zh-Hans" ]) { // Simplified Chinese input, including simplified pinyin, Jianti Wubi, simplified handwriting
UITextRange *selectedRange = [textField markedTextRange];
// Get the highlighted part
UITextPosition *position = [textField positionFromPosition:selectedRange.start offset:0];
//If there is no highlighted word, the word count and limit will be performed on the entered text
if(!position) {
if(toBeString.length > kHZMaxLength) {
textField.text = [toBeString substringToIndex:kHZMaxLength];
DSLog ( @"When Chinese characters exceed %@" , textField.text);
}
}
//If there is a highlighted string, the text will not be counted and restricted temporarily
else{
}
}
//You can directly limit statistics other than the Chinese input method, regardless of other languages
else{
if(toBeString.length > kEGMaxLength) {
textField.text= [toBeString substringToIndex:kEGMaxLength];
DSLog(@" 其他超过字符的时候 %@",textField.text);
}
}
//获取高亮部分
UITextRange *selectedRange = [textField markedTextRange];
UITextPosition *position = [textField positionFromPosition:selectedRange.start offset: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 > 15 && textField.markedTextRange == nil)
{
//用字符串的字符编码指定索引查找位置 一次遍历一个子串, 而不是遍历一个unichar了. 字符长度设置15
NSRange rangeIndex = [toBeString rangeOfComposedCharacterSequenceAtIndex:14];
if (rangeIndex.length == 1)
{
textField.text = [toBeString substringToIndex:15];
DSLog(@"====== 1 ====%@",textField.text);
}
else
{
//用字符串的字符编码指定区域段查找位置
// NSRange rangeRange = [toBeString rangeOfComposedCharacterSequencesForRange:NSMakeRange(0, Max_Length)];
textField.text = [toBeString substringWithRange:NSMakeRange(0, kEGMaxLength + 1)];
DSLog(@"====== 2 ====%@",textField.text);
}
} else {
length = toBeString.length;
DSLog(@"----- length ----%ld",(long)length);
}
}
}
- (NSInteger)getStringLengthWithString:(NSString *)string
{
__block NSInteger stringLength = 0;
[string enumerateSubstringsInRange:NSMakeRange(0, [string length])
options:NSStringEnumerationByComposedCharacterSequences
usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop)
{
const unichar hs = [substring characterAtIndex:0];
if (0xd800 <= hs && hs <= 0xdbff)
{
if (substring.length > 1)
{
const unichar ls = [substring characterAtIndex:1];
const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
if (0x1d000 <= uc && uc <= 0x1f77f)
{
stringLength += 1;
}
else
{
stringLength += 1;
}
}
else
{
stringLength += 1;
}
} else if (substring.length > 1)
{
const unichar ls = [substring characterAtIndex:1];
if (ls == 0x20e3)
{
stringLength += 1;
}
else
{
stringLength += 1;
}
} else {
if (0x2100 <= hs && hs <= 0x27ff)
{
stringLength += 1;
}
else if (0x2B05 <= hs && hs <= 0x2b07)
{
stringLength += 1;
}
else if (0x2934 <= hs && hs <= 0x2935)
{
stringLength += 1;
}
else if (0x3297 <= hs && hs <= 0x3299)
{
stringLength += 1;
}
else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50)
{
stringLength += 1;
}
else
{
stringLength += 1;
}
}
}];
return stringLength;
}