ios 输入框bar设置

_textView = [[class alloc] init];
        _textView.translatesAutoresizingMaskIntoConstraints = NO;
        _textView.font = [UIFont systemFontOfSize:15.0];
        _textView.maxNumberOfLines = [self slk_defaultNumberOfLines];

        _textView.typingSuggestionEnabled = YES;
        _textView.autocapitalizationType = UITextAutocapitalizationTypeSentences;
        _textView.keyboardType = UIKeyboardTypeTwitter;
        _textView.returnKeyType = UIReturnKeyDefault;
        _textView.enablesReturnKeyAutomatically = YES;
        _textView.scrollIndicatorInsets = UIEdgeInsetsMake(0.0, -1.0, 0.0, 1.0);
        _textView.textContainerInset = UIEdgeInsetsMake(8.0, 4.0, 8.0, 0.0);
        _textView.layer.cornerRadius = 5.0;
        _textView.layer.borderWidth = 0.5;
        _textView.layer.borderColor =  [UIColor colorWithRed:200.0/255.0 green:200.0/255.0 blue:205.0/255.0 alpha:1.0].CGColor;