blob: 010319ba54ed14d915343e2b44579e01bf29f623 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
using System.ComponentModel;
using System.Threading.Tasks;
using Xamarin.Forms.Internals;
#if __UNIFIED__
using UIKit;
using Foundation;
#else
using MonoTouch.UIKit;
using MonoTouch.Foundation;
#endif
namespace Xamarin.Forms.Platform.iOS
{
public class ImageCellRenderer : TextCellRenderer
{
public override UITableViewCell GetCell(Cell item, UITableViewCell reusableCell, UITableView tv)
{
var result = (CellTableViewCell)base.GetCell(item, reusableCell, tv);
var imageCell = (ImageCell)item;
WireUpForceUpdateSizeRequested(item, result, tv);
SetImage(imageCell, result);
return result;
}
protected override void HandlePropertyChanged(object sender, PropertyChangedEventArgs args)
{
var tvc = (CellTableViewCell)sender;
var imageCell = (ImageCell)tvc.Cell;
base.HandlePropertyChanged(sender, args);
if (args.PropertyName == ImageCell.ImageSourceProperty.PropertyName)
SetImage(imageCell, tvc);
}
async void SetImage(ImageCell cell, CellTableViewCell target)
{
var source = cell.ImageSource;
target.ImageView.Image = null;
IImageSourceHandler handler;
if (source != null && (handler = Registrar.Registered.GetHandler<IImageSourceHandler>(source.GetType())) != null)
{
UIImage uiimage;
try
{
uiimage = await handler.LoadImageAsync(source).ConfigureAwait(false);
}
catch (TaskCanceledException)
{
uiimage = null;
}
NSRunLoop.Main.BeginInvokeOnMainThread(() =>
{
target.ImageView.Image = uiimage;
target.SetNeedsLayout();
});
}
else
target.ImageView.Image = null;
}
}
}
|