1:
_descrViewab = [[UITextView alloc]initWithFrame:CGRectMake(15, CGRectGetMaxY(contentlab.frame)+20, SCREEN_WIDTH-30, 150)];
_descrViewab.delegate = self;
// _descrView.layer.borderColor = (__bridge CGColorRef)([UIColor blackColor]);
// _descrViewa.layer.borderWidth = 1;
_descrViewab.layer.cornerRadius = 5;
//返回键的类型
_descrViewab.returnKeyType = UIReturnKeyDefault;
// _descrViewa.contentSize = CGSizeMake(SCREEN_WIDTH-60, 150);
//键盘类型
//获得焦点
// [_descrViewa becomeFirstResponder];
_descrViewab.keyboardType = UIKeyboardTypeDefault;
[self.view addSubview:_descrViewab];
_placeholderLaba = [[UILabel alloc]initWithFrame:CGRectMake(5, 5, CGRectGetWidth(_descrViewab.frame)-5, 100)];
_placeholderLaba.backgroundColor = [UIColor clearColor];
_placeholderLaba.textColor = [UIColor grayColor];
_placeholderLaba.text = @"限二百字文字描述";
_placeholderLaba.numberOfLines=0;
[_placeholderLaba sizeToFit];
_placeholderLaba.font = _descrViewab.font;
[_descrViewab addSubview:_placeholderLaba];
2:代理
- (void)textViewDidBeginEditing:(UITextView *)textView
{
_placeholderLaba.text = @"";
}
//结束编辑
- (void)textViewDidEndEditing:(UITextView *)textView
{
[_descrViewab resignFirstResponder];
if (_descrViewab.text.length==0) {
_placeholderLaba.text =@"限二百字文字描述";
}
else{
_placeholderLaba.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
- (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;
}
}
3:点击任何地方键盘消失
:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event];
[self.view endEditing:YES];
//隐藏键盘
[_descrViewab resignFirstResponder];
// [self.editingTextField resignFirstResponder] ;
}
4:
限制字数可以是: 汉字各种等
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewEditChanged:) name:UITextViewTextDidChangeNotification object:_descrViewab]; viewdidload
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[[NSNotificationCenter defaultCenter]removeObserver:self
name:@"UITextViewTextDidChangeNotification"
object:_descrViewab];
}
// 监听文本改变
-(void)textViewEditChanged:(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 > MaxNumberOfDescriptionCharss) {
textView.text = [toBeString substringToIndex:MaxNumberOfDescriptionCharss];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"不能超过200个字!" 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 > MaxNumberOfDescriptionCharss) {
textView.text = [toBeString substringToIndex:MaxNumberOfDescriptionCharss];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"不能超过200个字!" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alert show];
}
}
}