Ios 使用Alamofire下载图像并在UITableViewCell中显示
我有两个功能:Ios 使用Alamofire下载图像并在UITableViewCell中显示,ios,json,uitableview,swift3,alamofire,Ios,Json,Uitableview,Swift3,Alamofire,我有两个功能: func callAlamo(url: String){ Alamofire.request(url).responseJSON(completionHandler: { response in self.parseData(JSONData: response.data!) }) } func parseData(JSONData: Data) { do { var readableJSON = tr
func callAlamo(url: String){
Alamofire.request(url).responseJSON(completionHandler: {
response in
self.parseData(JSONData: response.data!)
})
}
func parseData(JSONData: Data) {
do {
var readableJSON = try JSONSerialization.jsonObject(with: JSONData, options: .mutableContainers) as! JSONStandard
if let tracks = readableJSON["tracks"] as? JSONStandard{
if let items = tracks["items"] as? [JSONStandard]{
for i in 0..<items.count{
let item = items[i]
let name = item["name"] as! String
if let album = item["album"] as? JSONStandard{
if let images = album["images"] as? [JSONStandard]{
let imageData = images[0]
let mainImageUrl = URL(string: imageData["url"] as! String)
let mainImageData = NSData(contentsOf: mainImageUrl!)
let mainImage = UIImage(data: mainImageData as! Data)
posts.append(post.init(image: mainImage, name: name))
self.tableView.reloadData()
}
}
}
}
}
}
catch{
print(error)
}
}
我将如何使用这两个函数将检索到的信息获取到该图像中?因为我无法从图像模拟内部访问函数。使用“SDWebImage”库异步下载图像
请参阅以下链接:-
用途:-
目标C:
#import <SDWebImage/UIImageView+WebCache.h>
[imageView sd_setImageWithURL:[NSURL
URLWithString:imageURL]
placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
将图像存储在func parseData()中的“imgFinal”数组中:
添加此方法以下载图像:
func load_image(link:String, imageview:UIImageView, indVal:Int)
{
let url:NSURL = NSURL(string: link)!
let session = NSURLSession.sharedSession()
let request = NSMutableURLRequest(URL: url)
request.timeoutInterval = 10
let task = session.dataTaskWithRequest(request) {
(
let data, let response, let error) in
guard let _:NSData = data, let _:NSURLResponse = response where error == nil else {
return
}
var image = UIImage(data: data!)
if (image != nil)
{
func set_image()
{
//self.images_cache[link] = image
self.imgFinal[link] = image
imageview.image = image
}
dispatch_async(dispatch_get_main_queue(), set_image)
}
}
task.resume()
}
可以将图像存储在单独的成员变量中。由于您正在调用
reloadData
,它将调用tableView的委托方法,然后您可以在CellForRowatineXpath
中设置图像。如何将图像存储在单独的成员变量中?这在今天仍然相关,帮助很大。谢谢
import SDWebImage
imageView.sd_setImage(with: URL(string: imageURL), placeholderImage: UIImage(named: "placeholder.png"))
var imgFinal = [String:UIImage]()
self.imgArrList[i] = imageData["url"]
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CategoryTableViewCell
load_image((imgArrList[indexPath.row] as? String)!, imageview: cell.titleImage, indVal: indexPath.row)
return cell
}
func load_image(link:String, imageview:UIImageView, indVal:Int)
{
let url:NSURL = NSURL(string: link)!
let session = NSURLSession.sharedSession()
let request = NSMutableURLRequest(URL: url)
request.timeoutInterval = 10
let task = session.dataTaskWithRequest(request) {
(
let data, let response, let error) in
guard let _:NSData = data, let _:NSURLResponse = response where error == nil else {
return
}
var image = UIImage(data: data!)
if (image != nil)
{
func set_image()
{
//self.images_cache[link] = image
self.imgFinal[link] = image
imageview.image = image
}
dispatch_async(dispatch_get_main_queue(), set_image)
}
}
task.resume()
}