根据文本内容设置Button大小

        NSString * text = model.wordName;
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        btn.titleLabel.font = [UIFont systemFontOfSize:13.0];
        btn.layer.cornerRadius = 10;
        btn.backgroundColor = BottonBackgroundColor;
        [btn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
        [btn setTitle:text forState:UIControlStateNormal];
        [btn addTarget:self action:@selector(hotSearch:) forControlEvents:UIControlEventTouchUpInside];
        CGSize titleSize = [text sizeWithAttributes:@{NSFontAttributeName: [UIFont fontWithName:btn.titleLabel.font.fontName size:btn.titleLabel.font.pointSize]}];
        
        CGFloat width = titleSize.width+10;
        CGFloat height = titleSize.height+10;
        btn.frame = CGRectMake(Zwidth+=10, Zheight+10, width,height);