ios - 将 UIImage 添加到 UIAlertView 未按预期工作

Question

我正在开发一个应用程序。我尝试使用以下代码将 UIIMage 添加到 UIAlertView，

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Instruction"
                                                    message:@"Please TAP on Screen to Continue."
                                                   delegate:self
                                          cancelButtonTitle:@"OK"
                                          otherButtonTitles:nil];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(220, 50, 32, 32)];
UIImage *img = [UIImage imageNamed:@"pendingImg.png"];
[imageView setImage:img];
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
    [alert setValue:imageView forKey:@"accessoryView"];
}else{
    [alert addSubview:imageView];
}
[alert show];

我的图像尺寸为 32 × 32 像素。我收到如图所示的警报，

我应该给这个图像添加约束吗？或者还有什么要做的？

Answer 1

您可以将 imageView contentMode 设置为 UIViewContentModeScaleAspectFit,

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Instruction"
                                                    message:@"Please TAP on Screen to Continue."
                                                   delegate:self
                                          cancelButtonTitle:@"OK"
                                          otherButtonTitles:nil];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(220, 50, 32, 32)];
UIImage *img = [UIImage imageNamed:@"pendingImg.png"];
 imageView.contentMode = UIViewContentModeScaleAspectFit;

[imageView setImage:img];
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
    [alert setValue:imageView forKey:@"accessoryView"];
}else{
    [alert addSubview:imageView];
}
[alert show];

可能 Anbu.Karthik 建议的链接评论对您也有帮助。