質問編集履歴
3
savePhotoUrl変数の代入位置変更(できたとこまで。)
test
CHANGED
File without changes
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test
CHANGED
@@ -246,17 +246,21 @@
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246
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247
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let photoUrl = URL(string: photoUrlString)
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249
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-
savePhotoUrl = photoUrl
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250
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-
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// 読み込み(新規)
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if savePhotoUrl == nil {
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257
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-
self.photo.sd_setImage(with: photoUrl)
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+
self.photo.sd_setImage(with: photoUrl) { (image, error, SDImageCacheType, url) in
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256
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+
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258
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-
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+
self.savePhotoUrl = url
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+
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259
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-
}
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}
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260
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+
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261
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}
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262
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+
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263
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+
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// 何もしない(キャッシュ)
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@@ -268,9 +272,11 @@
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// キャンセル処理後に読み込み
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271
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-
else if savePhotoUrl != photoUrl /*&& 読み込み中*/ {
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+
else if savePhotoUrl != photoUrl /*&& 読み込み中*/ {
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272
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-
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276
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+
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273
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-
self.photo.sd_setImage(with:
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+
self.photo.sd_setImage(with: photoUrl) { (image, error, SDImageCacheType, url) in
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+
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self.savePhotoUrl = url
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}
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2
Postクラス(自作クラス)の追記と、UICollectionViewDataSourceを継承したクラスのviewDidLoad()の部分 を追記。
test
CHANGED
File without changes
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test
CHANGED
@@ -44,6 +44,56 @@
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44
44
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45
45
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46
46
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47
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+
Postクラス
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48
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+
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49
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+
```Swift
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50
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+
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51
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+
class Post {
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+
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53
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+
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54
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+
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55
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+
var id: String?
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56
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+
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57
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+
var timestamp: Int?
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58
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+
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59
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+
var imageUrls = [String]()
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60
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+
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61
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+
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62
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+
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63
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}
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64
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+
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65
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+
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66
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+
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67
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+
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68
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+
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extension Post {
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+
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+
static func transformPostPhoto(dict: [String: Any], key: String) -> Post {
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72
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+
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73
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+
let post = Post()
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74
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+
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75
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+
post.id = key
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76
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+
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77
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+
post.timestamp = dict["timestamp"] as? Int
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78
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+
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79
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+
let image0 = dict["image0"] as? String
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80
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+
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81
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+
let image1 = dict["image1"] as? String
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82
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+
|
83
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+
post.imageUrls.append(image0!)
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84
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+
|
85
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+
post.imageUrls.append(image1!)
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86
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+
|
87
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+
return post
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88
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+
|
89
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+
}
|
90
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+
|
91
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+
}
|
92
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+
|
93
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+
```
|
94
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+
|
95
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+
|
96
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+
|
47
97
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UICollectionViewDataSourceと、UICollectionViewDelegateFlowLayoutを継承したクラス
|
48
98
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|
49
99
|
```Swift
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@@ -198,19 +248,53 @@
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198
248
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199
249
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savePhotoUrl = photoUrl
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200
250
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|
251
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+
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252
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+
|
253
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+
// 読み込み(新規)
|
254
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+
|
255
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+
if savePhotoUrl == nil {
|
256
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+
|
257
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+
self.photo.sd_setImage(with: photoUrl)
|
258
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+
|
259
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+
}
|
260
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+
|
261
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+
// 何もしない(キャッシュ)
|
262
|
+
|
263
|
+
else if savePhotoUrl == photoUrl {
|
264
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+
|
265
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+
print("何もしない(キャッシュ)")
|
266
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+
|
267
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+
}
|
268
|
+
|
269
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+
// キャンセル処理後に読み込み
|
270
|
+
|
271
|
+
else if savePhotoUrl != photoUrl /*&& 読み込み中*/ {
|
272
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+
|
273
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+
self.photo.sd_setImage(with: savePhotoUrl)
|
274
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+
|
275
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+
}
|
276
|
+
|
277
|
+
// (必要なら解放処理後に)読み込み
|
278
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+
|
279
|
+
else if savePhotoUrl != photoUrl {
|
280
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+
|
281
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+
|
282
|
+
|
283
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+
}
|
284
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+
|
201
285
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|
202
286
|
|
203
|
-
if self.savePhotoUrl == photoUrl {
|
287
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+
// if self.savePhotoUrl == photoUrl {
|
204
288
|
|
205
289
|
|
206
290
|
|
207
|
-
self.photo.sd_setImage(with: photoUrl)
|
291
|
+
// self.photo.sd_setImage(with: photoUrl)
|
208
|
-
|
292
|
+
|
209
|
-
} else {
|
293
|
+
// } else {
|
210
|
-
|
294
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+
|
211
|
-
print("一致しないので読み込みキャンセル")
|
295
|
+
// print("一致しないので読み込みキャンセル")
|
212
|
-
|
296
|
+
|
213
|
-
}
|
297
|
+
// }
|
214
298
|
|
215
299
|
}
|
216
300
|
|
1
PostCollectionViewCellクラスのfunc updateView()を修正、追記しました。
test
CHANGED
File without changes
|
test
CHANGED
@@ -54,6 +54,48 @@
|
|
54
54
|
|
55
55
|
|
56
56
|
|
57
|
+
//追記
|
58
|
+
|
59
|
+
override func viewDidLoad() {
|
60
|
+
|
61
|
+
super.viewDidLoad()
|
62
|
+
|
63
|
+
|
64
|
+
|
65
|
+
var REF_POSTS = Database.database().reference().child("posts")
|
66
|
+
|
67
|
+
REF_POSTS.queryOrdered(byChild: "timestamp").observeSingleEvent(of: .value) { (snapshot) in
|
68
|
+
|
69
|
+
if let arraySnapshot = (snapshot.children.allObjects as? [DataSnapshot])?.reversed() {
|
70
|
+
|
71
|
+
|
72
|
+
|
73
|
+
arraySnapshot.forEach({ (child) in
|
74
|
+
|
75
|
+
if let dict = child.value as? [String: Any] {
|
76
|
+
|
77
|
+
let post = Post.transformPostPhoto(dict: dict, key: child.key)
|
78
|
+
|
79
|
+
|
80
|
+
|
81
|
+
self.posts.append(post)
|
82
|
+
|
83
|
+
}
|
84
|
+
|
85
|
+
})
|
86
|
+
|
87
|
+
|
88
|
+
|
89
|
+
self.collectionView.reloadData()
|
90
|
+
|
91
|
+
}
|
92
|
+
|
93
|
+
}
|
94
|
+
|
95
|
+
}
|
96
|
+
|
97
|
+
|
98
|
+
|
57
99
|
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
|
58
100
|
|
59
101
|
return posts.count
|
@@ -124,6 +166,8 @@
|
|
124
166
|
|
125
167
|
@IBOutlet weak var photo: UIImageView!
|
126
168
|
|
169
|
+
var savePhotoUrl: URL?
|
170
|
+
|
127
171
|
|
128
172
|
|
129
173
|
var post: Post? {
|
@@ -138,17 +182,39 @@
|
|
138
182
|
|
139
183
|
|
140
184
|
|
185
|
+
//修正&追記
|
186
|
+
|
141
187
|
func updateView() {
|
142
188
|
|
189
|
+
print("Thread.isMainThread ", Thread.isMainThread) // true
|
190
|
+
|
191
|
+
print("Thread.current ", Thread.current) //<NSThread: 0x281e91d40>{number = 1, name = main}
|
192
|
+
|
143
193
|
if let photoUrlString = post?.imageUrls[0] {
|
144
194
|
|
195
|
+
|
196
|
+
|
145
197
|
let photoUrl = URL(string: photoUrlString)
|
146
198
|
|
199
|
+
savePhotoUrl = photoUrl
|
200
|
+
|
201
|
+
|
202
|
+
|
203
|
+
if self.savePhotoUrl == photoUrl {
|
204
|
+
|
205
|
+
|
206
|
+
|
147
|
-
photo.sd_setImage(with: photoUrl)
|
207
|
+
self.photo.sd_setImage(with: photoUrl)
|
208
|
+
|
209
|
+
} else {
|
210
|
+
|
211
|
+
print("一致しないので読み込みキャンセル")
|
212
|
+
|
213
|
+
}
|
148
214
|
|
149
215
|
}
|
150
216
|
|
151
|
-
}
|
217
|
+
}
|
152
218
|
|
153
219
|
}
|
154
220
|
|