html5 - canvas在手机浏览器上无法保存成图片

Question

在canvas画了图片，用了toDataURL()，在电脑上可以成功保存，但是在手机浏览器上（欧朋浏览器、微信浏览器)无法保存成功，显示为下载失败，这是怎么回事？是手机的限制吗？还是需要一些设置。

Answer 1

Mainly due to the performance problem of mobile browsers. Small pictures of more than ten K are no problem, but if they are large, they will get stuck easily

Answer 2

Encountering the same problem, the current thing I can think of is to upload it to the server first, and then return a server-side image url address

Answer 3

I used to make a canvas to cut pictures. I saved the pictures generated by canvas through js. Because of the cross-domain problem of js, the pictures cannot be obtained, so they still have to be saved on the server.