oc字符串输入

  UITextView *textView = [[UITextViewalloc]initWithFrame:self.view.bounds];

    [self.viewaddSubview:textView];

    self.textView = textView;

    [self.textViewsetFont:[UIFontsystemFontOfSize:32]];

    

    unichar emoteChar = 0xe000;

    NSMutableString *string = [NSMutableStringstring];

    

    for (int i =0; i < 3000; i++) {

        [string appendFormat:@"%C ", emoteChar++];

    }

    

    [self.textViewsetText:string];