iOS 实现UIButton的文字和图片上下/左右显示

文字在左，图片在右：

UIButton *detailBtn = [UIButton buttonWithType:UIButtonTypeCustom];
detailBtn.frame = CGRectMake(50, 50, 100, 50);
detailBtn.backgroundColor = [UIColor cyanColor];

[detailBtn setTitle:@"详情" forState:UIControlStateNormal];
[detailBtn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
detailBtn.titleLabel.font = [UIFont systemFontOfSize:14];

[detailBtn setImage:[UIImage imageNamed:@"icon_list_箭头@2X"] forState:UIControlStateNormal];

[self.view addSubview:detailBtn];

// 重新设置位置，要写在按钮设置图片和文字之后，否则无效
detailBtn.titleEdgeInsets = UIEdgeInsetsMake(0, -detailBtn.imageView.bounds.size.width-6, 0, detailBtn.imageView.bounds.size.width+6);
detailBtn.imageEdgeInsets = UIEdgeInsetsMake(0, detailBtn.titleLabel.bounds.size.width, 0, -detailBtn.titleLabel.bounds.size.width);
// 居右
detailBtn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentRight;

效果如下：

image.png

上下布局等其他类似~