将UIView转成UIImage,将UIImage转成PNG/JPG

分类： UIImageView2013-03-12 17:37 350人阅读 评论(0)  举报

1. //UIView -> UIImage
2. #import “QuartzCore/QuartzCore.h”
3. //把UIView 转换成图片
4. -(UIImage *)getImageFromView:(UIView *)view{
5. UIGraphicsBeginImageContext(view.bounds.size);
6. [view.layer renderInContext:UIGraphicsGetCurrentContext()];
7. UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
8. UIGraphicsEndImageContext();
9. return image;
10. }
11. //UIImage -> PNG / JPG
12. // Create paths to output images
13. NSString*pngPath =[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.png"];
14. NSString*jpgPath =[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.jpg"];
15. // Write a UIImage to JPEG with minimum compression (best quality)
16. // The value 'image' must be a UIImage object
17. // The value '1.0' represents image compression quality as value from 0.0 to 1.0
18. 
    
19. [UIImageJPEGRepresentation(image,
    1.0) writeToFile:jpgPath
    atomically:YES];
20. // Write image to PNG
21. [UIImagePNGRepresentation(image)
    writeToFile:pngPath atomically:YES];
22. // Let's check to see if files were successfully written...
23. // Create file manager
24. NSError*error;
25. NSFileManager*fileMgr
    =[NSFileManager defaultManager];
26. // Point to Document directory
27. NSString*documentsDirectory
    =[NSHomeDirectory()
    stringByAppendingPathComponent:@"Documents"];
28. // Write out the contents of home directory to console
29. NSLog(@"Documents
    directory: %@", [fileMgr contentsOfDirectoryAtPath:documentsDirectory
    error:&error]);

http://blog.163.com/lzb4319@126/blog/static/7255470020125693048341/