报错为：

TTRequestLoader connection:didReceiveResponse:](354): TTDASSERT failed: 0 == _queue.maxContentLength || contentLength <=_queue.maxContentLength

解决方法：

// If you hit this assertion it's because a massive file is about to be downloaded.   // If you're sure you want to do this, add the following line to your app delegate startup   // method. Setting the max content length to zero allows anything to go through. If you just   // want to raise the limit, set it to any positive byte size.   // [[TTURLRequestQueue mainQueue] setMaxContentLength:0] So calling [[TTURLRequestQueue mainQueue] setMaxContentLength:0] should do it. 在layoutSubviews

- (void)layoutSubviews {

    [superlayoutSubviews];    

    _statusSpinner.frame = CGRectMake(141, 221, 37, 37);

    _statusSpinner.center = CGPointMake(160, 240);

    [[TTURLRequestQueuemainQueue] setMaxContentLength:0];

}