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[英]How to convert NSInputStream to NSString or how to read NSInputStream
[英]How convert NSInputStream to UIImage
我有一個NSInputStream,我正在發送到服務器,在上傳過程中,我想顯示正在上傳的圖像。 方法位於單例中,它正在接收NSInputStream。 有沒有辦法讀取該流並將其轉換為UIImage?
我試過這個,但沒有運氣。 我的錯誤在哪里?
var buffer = [UInt8](count:1024, repeatedValue: 0)
thumbnailStream.open()
if (thumbnailStream.hasBytesAvailable){
let len : Int = inputStream.read(&buffer, maxLength: buffer.count)
var pictureData = NSData(bytes: buffer, length: len)
var imagess = UIImage(data: pictureData)!
self.headerProgress.imageView.image = imagess
print("Data of image = \(pictureData.length)")
}else{
print("No bytes")
}
謝謝!
我找到了這個問題的解決方案,它處於正常運行狀態。
var count = 0
let dataOfTheImage = NSMutableData()
var buffer = [UInt8](count:1024, repeatedValue: 0)
thumbnailStream.open()
//MARK: Loop through thumbnail stream
while (thumbnailStream.hasBytesAvailable){
count = count + 1
print("Counter: \(count)")
//MARK: Read from the stream and append bytes to NSMutableData variable
let len = thumbnailStream.read(&buffer, maxLength: buffer.count)
dataOfTheImage.appendBytes(buffer, length: len)
//MARK: Size of the image in MB
let size = Float(dataOfTheImage.length) / 1024.0 / 1024.0
print("Data length = \(size)")
}
//MARK: Check if there are no bytes left and show the image
if (thumbnailStream.hasBytesAvailable == false){
thumbnailStream.close()
// var pictureData = NSData(bytes: buffer, length: len)
let progressImage = UIImage(data: dataOfTheImage)!
dispatch_async(dispatch_get_main_queue(), {() -> Void in
self.headerProgress.imageView.image = progressImage
})
}
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