看 日志： 七牛

1478510589.049832 resp ===== (null)
1478510589.521666 info =====
1478510589.522093 resp ===== (null)



改 七牛， 美国

+ (instancetype)zoneNa {
    static QNZone *zNa = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        zNa = [QNZone createWithHost:@"upload-na0.qiniu.com" backupHost:@"up-na0.qiniu.com" ip1:@"23.236.102.2" ip2:@"23.236.102.3"];
    });
    return zNa;
}