Compress image size to below 1 MB in swift iOS - ios

Question

In iOS swift need to compress image size to below 1 MB by following this thread How to compress of reduce the size of an image before uploading to Parse as PFFile? (Swift) tried with below code it returns nil.
extension UIImage {
// MARK: - UIImage+Compression
func compressTo(_ expectedSizeBelowMb:Int) -> Data? {
let sizeInBytes = expectedSizeBelowMb * 1024 * 1024
var needCompress:Bool = true
var imgData:Data?
var compressingValue:CGFloat = 1.0
while (needCompress && compressingValue > 0.0) {
if let data:Data = self.jpegData(compressionQuality: compressingValue) {
if data.count < sizeInBytes {
needCompress = false
imgData = data
} else {
compressingValue -= 0.1
}
}
}
if let data = imgData, data.count < sizeInBytes {
return data
}
return nil
}
}
Can anyone suggest me correct way of compressing image size to below 1 MB.

Answer 1

You can try this code:
extension UIImage {
func resizedTo1MB() -> UIImage? {
guard let imageData = self.pngData() else { return nil }
let megaByte = 1000.0
var resizingImage = self
var imageSizeKB = Double(imageData.count) / megaByte // ! Or devide for 1024 if you need KB but not kB
while imageSizeKB > megaByte { // ! Or use 1024 if you need KB but not kB
guard let resizedImage = resizingImage.resized(withPercentage: 0.5),
let imageData = resizedImage.pngData() else { return nil }
resizingImage = resizedImage
imageSizeKB = Double(imageData.count) / megaByte // ! Or devide for 1024 if you need KB but not kB
}
return resizingImage
}
}