Question

我有一个应用程序，其中UIButton使用title和UIImage。他们的alignment似乎是第一个标题，之后是UIImage。

我试过这个：

[dropdownbutton setImage: [UIImage imageNamed:@"down_sml_arrow.png"] 
                                     forState:UIControlStateNormal];
CGFloat spacing = 10; // the amount of spacing to appear between image and title
dropdownbutton.imageEdgeInsets = UIEdgeInsetsMake(0, 0, 0, spacing);
dropdownbutton.titleEdgeInsets = UIEdgeInsetsMake(0, spacing, 0, 0);
[dropdownbutton setTitle:@"Your text" forState:UIControlStateNormal];

但是UIImage来到标题之前。有人能指出我出错的地方吗？

Answer 1

替代

UIImageView *imageView1=[[UIImageView alloc]init];
UIButton *dropdownbutton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
dropdownbutton.frame=CGRectMake(50, 50, 120, 50);
imageView1.image=[UIImage imageNamed:@"arrows.png"];
imageView1.frame=CGRectMake(85, 12, 25, 25);
dropdownbutton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
[dropdownbutton addSubview:imageView1];
CGFloat spacing = 10; // the amount of spacing to appear between image and title
dropdownbutton.titleEdgeInsets = UIEdgeInsetsMake(0, spacing, 0, 0);
[dropdownbutton setTitle:@"Your text" forState:UIControlStateNormal];
[self.view addSubview:dropdownbutton];

Answer 2

有时创建IUButton的子类会使事情变得更容易，因为图像和文本的结构彼此依赖。创建UIButton的子类：

@interface DropDownButton : UIButton

并覆盖实现（.m）文件中的layoutSubviews方法：

@implementation DropDownButton

- (void)layoutSubviews {

[super layoutSubviews];

//Use the lines below if you have a specific image for the button
//float imageWidth = 67; 
//float imageHeight = 25;

UIImageView *imageView = [self imageView];
UILabel *label = [self titleLabel];

CGRect imageFrame = imageView.frame;
CGRect labelFrame = label.frame;

labelFrame.origin.x = (self.frame.size.width * 1) / 3;
labelFrame.size.width = self.frame.size.width;


imageFrame.origin.x = 10;

[label setShadowOffset:CGSizeMake(0, -0.5)];
[label setFont:[UIFont fontWithName:@"Helvetica" size:22.0]];
[label setTextAlignment:UITextAlignmentLeft];

imageView.frame = imageFrame;
label.frame = labelFrame;

}

如果您坚持使用边缘插入，请尝试使用

dropdownbutton.contentMode = UIViewContentModeLeft;

在给予插图之前;它可能有所帮助。

UIButton：如何使用imageEdgeInsets和titleEdgeInsets设置图像和文本？

2 个答案: