(bug): ng-upload filelist binding

[dylanvdmerwe]

Reproduction link

https://angular-y1cpfq.stackblitz.io

Steps to reproduce

Setup an nz-upload component.
Binding it to a fileList as per the docs.
Once the page has loaded, perhaps there are some files that need to be displayed that are loaded asynchronously.
Add these images into the fileList by pushing or recreating the

What is expected?

A picture-card nz-upload component should display images that have been added into the fileList.

What is actually happening?

Binding issue. Items added manually into fileList do not appear on the images for the component.

Environment	Info
ng-zorro-antd	7.5.1
Browser	Chrome 75

[cipchk]

According to Angular documentation，developers should not use push or splice to change the data passed to nzFileList

  ngOnInit() {
    setTimeout(() => {
      console.log("adding new image");
      this.fileList = this.fileList.concat(
        {
          uid: -2,
          name: 'xxx.png',
          status: 'done',
          url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png'
        }
      )
    }, 4000);
  }

[dylanvdmerwe]

Yes I can confirm the binding does work when using concat. Thank you for the information.