ios - 创建方形而不是圆形边缘效果 UIProgressView

Question

我有一个 UIProgressView，我试图使它具有方形而不是圆形边缘。我没有看到任何明显的方法来做到这一点，所以我的想法是让进度图像本身比它的方形框架大一点，这样进度图像就会被裁剪成方形。但是，无论我如何改变进度图像的大小，我似乎都无法实现这种效果。谁能告诉我是否有办法实现我的目标？

这是我目前在 UIView 子类中拥有的内容:

self.progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
self.progressView.trackImage = [PLStyle imageForColor:[PLColors greyLight] inFrame:CGRectMake(0, 0, 1, ProgressViewHeight)];
self.progressView.progressImage = [PLStyle imageForColor:[PLColors orange] inFrame:CGRectMake(0, 0, 1, ProgressViewHeight)];

[self.progressView setTranslatesAutoresizingMaskIntoConstraints:NO];
[self addSubview:self.progressView];

[self addConstraint:
 [NSLayoutConstraint constraintWithItem:self.progressView
                              attribute:NSLayoutAttributeLeading
                              relatedBy:NSLayoutRelationEqual
                                 toItem:self.imageView
                              attribute:NSLayoutAttributeTrailing
                             multiplier:1
                               constant:LeadingOrTrailingSpace]];

[self addConstraint:
 [NSLayoutConstraint constraintWithItem:self.progressView
                              attribute:NSLayoutAttributeCenterY
                              relatedBy:NSLayoutRelationEqual
                                 toItem:self
                              attribute:NSLayoutAttributeCenterY
                             multiplier:1
                               constant:0]];

[self addConstraint:
 [NSLayoutConstraint constraintWithItem:self.progressView
                              attribute:NSLayoutAttributeTrailing
                              relatedBy:NSLayoutRelationEqual
                                 toItem:self.counter
                              attribute:NSLayoutAttributeLeading
                             multiplier:1
                               constant:-LeadingOrTrailingSpace]];

[self addConstraint:
 [NSLayoutConstraint constraintWithItem:self.progressView
                              attribute:NSLayoutAttributeHeight
                              relatedBy:NSLayoutRelationEqual
                                 toItem:nil
                              attribute:NSLayoutAttributeNotAnAttribute
                             multiplier:1
                               constant:ProgressViewHeight]];

//上面用于在进度 View 中创建图像的方法定义

+ (UIImage *)imageForColor:(UIColor *)color inFrame:(CGRect)rect
{
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return image;
}

Answer 1

设置UIProgressViewStyle到 bar

Objective-C :

[progressView setProgressViewStyle: UIProgressViewStyleBar];

swift :

progressView.progressViewStyle = .bar