将UIView转成UIImage,将UIImage转成PNG/JPG
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2014-03-12
3928
image/image/
objective-c/objective-c/
frameworks/frameworks/
xcodexcode
- //把UIView 转换成图片
- -(UIImage *)getImageFromView:(UIView *)view{
- UIGraphicsBeginImageContext(view.bounds.size);
- [view.layer renderInContext:UIGraphicsGetCurrentContext()];
- UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
- UIGraphicsEndImageContext();
- return image;
- }
-
-
- //UIImage -> PNG / JPG
- // Create paths to output images
- NSString *pngPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.png"];
- NSString *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.jpg"];
-
- // Write a UIImage to JPEG with minimum compression (best quality)
- // The value 'image' must be a UIImage object
- // The value '1.0' represents image compression quality as value from 0.0 to 1.0
-
- [UIImageJPEGRepresentation(image, 1.0) writeToFile:jpgPath atomically:YES];
-
- // Write image to PNG
- [UIImagePNGRepresentation(image) writeToFile:pngPath atomically:YES];
-
- // Let's check to see if files were successfully written...
- // Create file manager
- NSError *error;
- NSFileManager *fileMgr = [NSFileManager defaultManager];
-
- // Point to Document directory
- NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
-
- // Write out the contents of home directory to console
- NSLog(@"Documents directory: %@", [fileMgr contentsOfDirectoryAtPath:documentsDirectory error:&error]);
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