如何使用swift将UIImage保存为字节？ [英] How to save UIImage into byte using swift ?

问题描述

大家好，

我想使用iOS swift在sqlite数据库中保存UIImage。我该怎么做？



当我检索字节时，我想将其转换为UIImage。

Hi All,
I want to save UIImage in sqlite database using iOS swift. How can i do this?

Also when i retrieve bytes then i want to convert this into UIImage.

推荐答案

将UIImage转换为字节的技巧： -



1st将UIImage（）转换为NSData（）。



然后将NSData传递给

Tricks to convert UIImage into byte :-

1st convert UIImage() to NSData() .

Then pass the NSData to the

getArrayOfBytesFromImage() and get the return as NSMutableArray 

func getArrayOfBytesFromImage(imageData:NSData) -> NSMutableArray
{

    // the number of elements:
    let count = imageData.length / sizeof(UInt8)

    // create array of appropriate length:
    var bytes = [UInt8](count: count, repeatedValue: 0)

    // copy bytes into array
    imageData.getBytes(&bytes, length:count * sizeof(UInt8))

    var byteArray:NSMutableArray = NSMutableArray()

    for (var i = 0; i < count; i++) {
        byteArray.addObject(NSNumber(unsignedChar: bytes[i]))
    }

    return byteArray


}

总是建议..我们应该在本地数据库中保存UIImage的NSData

It is always recommended that .. we should save NSData of UIImage in local DB

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