Question

我正在使用内置自定义元素的UITable视图，我无法将图片保留在我最初放置的位置。

我只是关注本网站的教程Team tree house

这就是我的设计外观以及它是如何在模拟器中出现的。请注意，我没有使用Autolayout，因为视频中的人说我们不应该这样做。

我尝试更改项目以使用Autolayout并添加约束，但这也不起作用。

我添加了一些自定义代码，以确保控件保持不变但没有。

这就是我的代码。

EntryListTableViewController.m

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";
    EntryCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    DiaryEntry *entry = [self.fetchResultsController objectAtIndexPath:indexPath];

    [cell configureCellItemProperties];
    [cell configureCellForEntry:entry];
    [cell fixImage];

    return cell;
}

EntryCell.m（仅限相关方法）

+ (CGFloat) heightForEntry: (DiaryEntry *) entry {

    const CGFloat topMargin = 35.0f;
    const CGFloat bottomMargin = 95.0f;
    const CGFloat minHeight = 106.0f;

    //The actual size of the label devided by 2 otherwise is not going to get it right.
    const CGFloat originalLabelWidth = 202.0f;


    CGSize constraint = CGSizeMake(originalLabelWidth, CGFLOAT_MAX);
    NSStringDrawingOptions options = (NSStringDrawingUsesFontLeading | NSStringDrawingUsesLineFragmentOrigin);
    UIFont *font = [UIFont defaultFontMedium];
    NSDictionary <NSString *, id> *attributes = @{NSAttachmentAttributeName: font};

    CGRect boundingBox = [entry.body boundingRectWithSize:constraint options:options attributes:attributes context:nil];


    return MAX(minHeight, (CGRectGetHeight(boundingBox) + topMargin + bottomMargin));

}

- (void) configureCellItemProperties {


    [self.dateLabel setFont:[UIFont defaultFontBoldMedium]];
    self.dateLabel.textColor = [UIColor portgoreColor];


    [self.bodyLabel setFont:[UIFont defaultFontMedium]];
    self.bodyLabel.textColor = [UIColor portgoreColor];
    [self.bodyLabel setNumberOfLines:0];
    [self sizeToFit];


    [self.locationLabel setFont:[UIFont defaultFontMedium]];
    self.locationLabel.textColor = [UIColor silverColor];

}

- (void) configureCellForEntry: (DiaryEntry *)entry {

    self.bodyLabel.text = entry.body;
    self.locationLabel.text = entry.location;

    NSDateFormatter *dateFormatter = [NSDateFormatter defaultWeekMonthDayYear];
    NSDate *date = [NSDate dateWithTimeIntervalSince1970:entry.date];
    self.dateLabel.text = [dateFormatter stringFromDate:date];


    if (entry.image) {
        self.mainImageView.image = [UIImage imageWithData:entry.image];
    }else {
        self.imageView.image = [UIImage imageNamed:@"icn_noimage"];
    }


    if (entry.mood == DiaryEntryMoodGood) {
        self.moodImageView.image = [UIImage imageNamed:@"icn_happy"];
    } else if (entry.mood == DiaryEntryMoodAverage){
        self.imageView.image = [UIImage imageNamed:@"icn_average"];
    } else if (entry.mood == DiaryEntryMoodBad) {
        self.imageView.image = [UIImage imageNamed:@"icn_bad"];
    }

}

- (void) fixImage {

    CGRect contentBounds = self.contentView.bounds;
    CGRect imageFrame = self.imageView.frame;

    imageFrame.origin.x = contentBounds.origin.x + 8;
    imageFrame.origin.y = contentBounds.origin.y;

    self.imageView.frame = imageFrame;

}

非常感谢您的帮助：）

Answer 1

你要自己踢。

在

if (entry.image) {
    self.mainImageView.image = [UIImage imageWithData:entry.image];
}else {
    self.imageView.image = [UIImage imageNamed:@"icn_noimage"];
}

您在imageView声明中设置了单元格的mainImageView图片，而不是else的图片。

设置moodImageView图像时也会遇到同样的错误。

希望有所帮助！

UITableViewCell图像锚定在顶部

1 个答案: