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[英]How can i change background color of UIButton on click in UITableviewCell?
[英]How can I change the background color of an specific UIViewCollectionCell?
我有一個包含三個部分的UIViewCollection,並且我想更改具有特定文本的UIViewCollectionCell的背景顏色。 為了獲得一些想法,這就是我想要的:
這是我在Objective-C上的代碼:
BOOL isExactHour = [_working_dayArray containsObject:@"07:00"];
if (isExactHour) {
NSInteger indexValue = [_working_dayArray indexOfObject:@"07:00"];
NSIndexPath *path = [NSIndexPath indexPathWithIndex:indexValue];
UICollectionViewCell *cell = [_timetablesCollection cellForItemAtIndexPath:path];
[cell setBackgroundColor:[UIColor colorWithRed:250 green:255 blue:150 alpha:.8]];
但是,如果我執行NSLog,則path
返回<NSIndexPath: 0xc00000000000000e> {length = 1, path = 0}
,並且UIViewCollectionCell仍為白色。
有人可以幫忙嗎?
非常感謝。
您應該在像這樣的數據源方法期間更新單元格。 請記住,為了給所有確切在一個小時內到達的單元格着色,除了日期之類的字符串外,您可能還需要使用其他一些比較:
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"mycellidentifier" forIndexPath:indexPath];
//Grab the string from whatever internal storage you are using. This would work if you only have one section, be aware it might not be exact for your case.
NSString *hour = [_working_dayArray objectAtIndex:indexPath.row];
if ([hour isEqualToString:@"7:00"]) {
//Color cell background yellow
} else {
//Color cell background white
}
return cell;
}
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