1. 遵循代理<UITextViewDelegate>
2.設置代理self.textView.delegate = self;
3. 實現代理方法:
- (BOOL)textView:(UITextView*)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString*)text
{
? ? if([text isEqualToString:@"\n"]) {
? ? ? ? [textView resignFirstResponder];
? ? ? ? returnNO;
? ?}
? ? return YES;
}