问题
In my application i want to show the size of downloading image in label.like, 5 KB of 2MB .
Progress bar is used to show the image downloading and i want to show the total size of
currently downloading image as well as completed size of downloading(like,5 KB of 2 MB)
Anyone give me guidance to do this.
For this What should i do.please give me any sample code or tutorial for this.
Added Informations:
Already i'm using ASIHTTP Library .There are several delegate methods.In which method i want to give the code for finding the total size of the download image and progress of the downloding image.Please give me a code for findout the size of both (total size and downloaded size ) of an image.Please help me .stil i have no idea to find the size and which delegate method is used to support.
I'm really struggle in this.Please any one guide me to do this.
回答1:
Since you need some real code to start with, here are a few hints.
- Drag and drop the ASIHTTPRequest package into your project.
- Since what you want is download images from the internet, you only need to deal with one class in the ASI package, the ASIHTTPRequest class.
- Read the ASIHTTPRequest.h file closely before you start. It has every interface you need.
- Specifically, pay attention to these two methods, you will have to override them to get real-time download statistics.
.
- (void)request:(ASIHTTPRequest *)request incrementDownloadSizeBy:(long long)newLength;
- (void)request:(ASIHTTPRequest *)request didReceiveBytes:(long long)bytes;
回答2:
You can implement your own download progress system, or a simpler alternative that avoids reinventing the wheel would be to use the excellent ASIHTTPRequest library that provides you with a delegate method for getting the progress of a current download. It's also rather well documented: http://allseeing-i.com/ASIHTTPRequest/
回答3:
Here's a complete tutorial for building iPhone app downloading images from internet:
In part 2 there's the mechanics of having a progress bar, just download the sample project.
http://www.touch-code-magazine.com/update-your-iphone-app-with-new-content-part-2/
来源：https://stackoverflow.com/questions/5027434/progress-bar-downloading-image