ios - UIButton:在标题旁边放置图像

Question

我需要在标题标签旁边(右侧)放置一个 ImageView ，所以我用以下方法创建了一个类别:

- (void)updateInsetsToMoveImageRightToText:(NSString *)text {
    CGFloat textWidth = [text sizeWithAttributes:[self.titleLabel.attributedText attributesAtIndex:0 effectiveRange:NULL]].width;
    CGFloat newXPosition = (self.frame.size.width - (self.frame.size.width - textWidth) / 2);
    self.imageEdgeInsets = UIEdgeInsetsMake(0., newXPosition, 0., 0.);
    self.titleEdgeInsets = UIEdgeInsetsMake(0., 0., 0., self.imageView.image.size.width);
}

我是这样使用它的:

- (void)quizzesFilterView:(QuizzesFilterView *)filterView didSelectFilter:(QuizFilterType)type {
    self.filterType = type;
    NSString *newTitle = [QuizzesFilterView filterNameByType:type];
    [self.filterButton setTitle:newTitle forState:UIControlStateNormal];
    [self.filterButton updateInsetsToMoveImageRightToText:newTitle];
    [self removeFilterView];
    [self updateSearchedQuizzesWithSearchText:nil quizFilterType:type];
    [self updateTableUi];
}

但它不适用于较小的标题:

我做错了什么？

Answer 1

看来你的计算有误，试一试。

- (void)updateInsetsToMoveImageRightToText:(NSString *)text {
    CGFloat textWidth = [text sizeWithAttributes:[self.titleLabel.attributedText attributesAtIndex:0 effectiveRange:NULL]].width;
    CGFloat newXPosition = (self.frame.size.width / 2) + (width / 2); //left offset
    self.imageEdgeInsets = UIEdgeInsetsMake(0.0, newXPosition, 0.0, 0.0); 
    self.titleEdgeInsets = UIEdgeInsetsMake(0., 0., 0., self.imageView.image.size.width);
}

如果这不能解决问题，您可以将图像添加为按钮的 subview ，并根据文本的宽度更轻松地定位它。

Add an image inside UIButton as an accesory