UIEdgeInset问题定位文本/图像

Question

我尝试在文本上方创建一个带有图像的UIButton，所以我使用以下代码：

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(x, y, 140, 140);
[btn setTitle:self.objMateria.titoloMateria forState:UIControlStateNormal];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btn setBackgroundColor:[UIColor clearColor]];
[btn setImage:[UIImage imageNamed:@"pala.png"] forState:UIControlStateNormal];
btn.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 20, 0);
btn.titleEdgeInsets = UIEdgeInsetsMake(120, 0, 0, 0);

问题是，在这段代码中，我看不到文本，它似乎被图像所覆盖，错误在哪里？

下面是图片：

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Answer 1

尝尝这个

btn.imageEdgeInsets = UIEdgeInsetsMake(-20, 0, 0, 0);
btn.titleEdgeInsets = UIEdgeInsetsMake(120, -120, 0, 0);

调整-120的值，即left以水平适合您的标题

Answer 2

你能按如下方式修改你的代码吗？

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(20, 20, 140, 140);
[btn setTitle:@"pala" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[btn setBackgroundColor:[UIColor clearColor]];
[btn setImage:[UIImage imageNamed:@"pala.png"] forState:UIControlStateNormal];
btn.imageEdgeInsets = UIEdgeInsetsMake(-20, 0, 0, 0);
UIImage *imageTemp = [UIImage imageNamed:@"pala.png"];
btn.titleEdgeInsets = UIEdgeInsetsMake(imageTemp.size.height, -imageTemp.size.width, 0, 0);
[self.view addSubview:btn];