设置Waiting的标题，竟然有些文字切换存在自动换行行为~~

var waiting;  

    var showWai = function(_i) {  

        if (waiting) {  
            waiting.setTitle("  "+_i+"%  ");  
        } else {  

            waiting = plus.nativeUI.showWaiting("  0%  ", {  
                back: "none",  
                width: "140px",  
                size: "12px",  
                background: "rgba(0,0,0,0.5)"  
            });  

        }  
        _i += 1;  
        setTimeout(function() {  
            showWai(_i);  
        }, 1000);  
    }

在前后两边填空格才会好些~暂时算解决！