1:_descrView = [[UITextView alloc]initWithFrame:CGRectMake(15, CGRectGetMaxY(describelab.frame)+10, SCREEN_WIDTH-30, 150)];
_descrView.delegate = self;
_descrView.layer.cornerRadius = 5;
//返回键的类型
_descrView.returnKeyType = UIReturnKeyDefault;
//键盘类型
_descrView.keyboardType = UIKeyboardTypeDefault;
[scrollv addSubview:_descrView];
//gzz0222 高度刚开始为40
_placeholderLab = [[UILabel alloc]initWithFrame:CGRectMake(5, 5, CGRectGetWidth(_descrView.frame)-10, 20)];
_placeholderLab.backgroundColor = [UIColor clearColor];
_placeholderLab.textColor = [UIColor grayColor];
_placeholderLab.text = @"详细描述您的问题，包括身体状况等限二百字内";
_placeholderLab.font = _descrView.font;
_placeholderLab.numberOfLines = 0;
_placeholderLab.lineBreakMode=NSLineBreakByWordWrapping;//gzz0223
[_placeholderLab sizeToFit];
_placeholderLab.font = SYSTEMFONT(14);
[_descrView addSubview:_placeholderLab];
2:textview 代理方法
- (void)textViewDidBeginEditing:(UITextView *)textView
{
_placeholderLab.text = @"";
}
//结束编辑
- (void)textViewDidEndEditing:(UITextView *)textView
{
[_descrView resignFirstResponder];
if (self.descrView.text.length==0) {
_placeholderLab.text =@"详细描述您的问题，包括身体状况等限二百字内";
}
else{
_placeholderLab.text = @"";
}
}
//控制输入文字的长度和内容，可通调用以下代理方法实现 gzz0203
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
// if (range.location>=200)
// {
// //控制输入文本的长度
// UIAlertView *alve = [[UIAlertView alloc]initWithTitle:@"提示" message:@"输入内容最多200字" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
// [alve show];
//
// return NO;
// }
if ([text isEqualToString:@" "]) {
//禁止输入换行
[textView resignFirstResponder];
return NO;
}
else
{
return YES;
}
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event];
[self.view endEditing:YES];
//隐藏键盘
[_descrView resignFirstResponder];
}
/*============ textfield textview delegate=============================*/
3:监听文本字数 汉字 字母 数字 全部
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewEditChanged11:) name:UITextViewTextDidChangeNotification object:_descrView];
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[[NSNotificationCenter defaultCenter]removeObserver:self
name:@"UITextViewTextDidChangeNotification"
object:_descrView];
}
// 监听文本改变
-(void)textViewEditChanged11:(NSNotification *)obj{
UITextView *textView = (UITextView *)obj.object;
NSString *toBeString = textView.text;
NSString *lang = [[UITextInputMode currentInputMode] primaryLanguage]; // 键盘输入模式
if ([lang isEqualToString:@"zh-Hans"]) { // 简体中文输入，包括简体拼音，健体五笔，简体手写
UITextRange *selectedRange = [textView markedTextRange];
//获取高亮部分
UITextPosition *position = [textView 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 >200) {
textView.text = [toBeString substringToIndex:200];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"输入内容最多200字" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alert show];
}
}
// 有高亮选择的字符串，则暂不对文字进行统计和限制
else{
}
}
// 中文输入法以外的直接对其统计限制即可，不考虑其他语种情况
else{
if (toBeString.length > 200) {
textView.text = [toBeString substringToIndex:200];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"输入内容最多200字" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alert show];
}
}
}