UITextView限制行数

-(BOOL)textView:(UITextView *)textViewshouldChangeTextInRange:(NSRange)range
 replacementText:(NSString*)text {
 
   if (textView.contentSize.height > 104){
      textView.text = [textView.text substringToIndex:[textView.textlength]-1];
       returnNO;
   }


   return YES;
}

-(void)textViewDidChangeSelection:(UITextView*)textView
每次输入都知道

[textView becomeFirstResponder]

(void)textViewDidChange:(UITextView*)textView 当textView的内容发生改变时，会调用。。再此计算已经输入的字符个数。

- (BOOL)textView:(UITextView*)textView shouldChangeTextInRange:(NSRange)rangereplacementText:(NSString *)text; {

if([@"\n" isEqualToString:text] == YES) {
  [textViewresignFirstResponder];
  returnNO;
  }
  returnYES;
}

- (BOOL)textView:(UITextView*)textView shouldChangeTextInRange:(NSRange)rangereplacementText:(NSString *)text;