頁面啟動(dòng)時(shí)添加通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewChange:) name:@"UITextViewTextDidChangeNotification" object:self.txtSuggestion];
 
 
 
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    NSString *toBeString = [textView.text stringByReplacingCharactersInRange:range withString:text];
    if (toBeString.length > kMaxLength && range.length!=1){
        textView.text = [toBeString substringToIndex:kMaxLength];
        return NO;
    }
    return YES;
}
 
-(void)textViewChange:(NSNotification *)obj{
    UITextField *textField = (UITextField *)obj.object;
     
    NSString *toBeString = textField.text;
    NSString *lang = [[UIApplication sharedApplication]textInputMode].primaryLanguage; // 鍵盤輸入模式
    if ([lang isEqualToString:@"zh-Hans"]) { // 簡(jiǎn)體中文輸入，包括簡(jiǎn)體拼音，健體五筆，簡(jiǎn)體手寫
        UITextRange *selectedRange = [textField markedTextRange];
        //獲取高亮部分
        UITextPosition *position = [textField positionFromPosition:selectedRange.start offset:0];
        // 沒有高亮選擇的字，則對(duì)已輸入的文字進(jìn)行字?jǐn)?shù)統(tǒng)計(jì)和限制
        if (!position) {
            if (toBeString.length > kMaxLength) {
                textField.text = [toBeString substringToIndex:kMaxLength];
            }
        }
        // 有高亮選擇的字符串，則暫不對(duì)文字進(jìn)行統(tǒng)計(jì)和限制
        else{
             
        }
    }
    // 中文輸入法以外的直接對(duì)其統(tǒng)計(jì)限制即可，不考慮其他語種情況
    else{
        if (toBeString.length > kMaxLength) {
            textField.text = [toBeString substringToIndex:kMaxLength];
        }  
    }  
}
 
 
離開頁面時(shí)
[[NSNotificationCenter defaultCenter]removeObserver:self name:@"UITextFieldTextDidChangeNotification"  
object:self.txtSuggestion];

標(biāo)簽： idc

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