blocks|key|1037840|text|是的，您应该继承UIImageView的子类，并在整个项目中使用您的自定义子类。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1037841|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Yes, you should subclass UIImageView, and use your custom subclass throughout your project.

blocks|key|2447314|text|您可以为UIImage使用一个类别，这是对一个类进行子类化的另一种方式，有时对于小的更改也更容易。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2447315|例如，添加一个方法，它返回一个设置了圆角属性的UIImage。|2447316|%2B(UIImage+*)imageWithContentsOfFile:(NSString+*)file+cornerRadius:(NSInteger)...+|code-block|syntax|javascript|2447317|有关Objective-c类别的更多信息，请访问http://macdevelopertips.com/objective-c/objective-c-categories.html|offset|length|2447318|entityMap|0|LINK|mutability|MUTABLE|url|http://macdevelopertips.com/objective-c/objective-c-categories.html^0|0|0|0|O|1V|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

You could use a category for UIImage which is an alternate way to subclass a Class and sometimes easier for just small changes.

e.g add a method that returns a UIImage with the rounded corner attributes set.

<pre><code>+(UIImage *)imageWithContentsOfFile:(NSString *)file cornerRadius:(NSInteger)... 
</code></pre>

more info on Objective-c categories can be found <a href="http://macdevelopertips.com/objective-c/objective-c-categories.html" rel="noreferrer">http://macdevelopertips.com/objective-c/objective-c-categories.html</a>

blocks|key|37775|text|检查这个-+Rounded+Corners+on+UIImage|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|37776|图层修改似乎是最好的方法。|37777|UIImageView+*+roundedView+=+[[UIImageView+alloc]+initWithImage:+[UIImage+imageNamed:@"wood.jpg"]];
//+Get+the+Layer+of+any+view
CALayer+*+l+=+[roundedView+layer];
[l+setMasksToBounds:YES];
[l+setCornerRadius:10.0];|code-block|syntax|javascript|37778|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/205431/rounded-corners-on-uiimage^0|6|Q|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Check this - 
<a href="https://stackoverflow.com/questions/205431/rounded-corners-on-uiimage">Rounded Corners on UIImage</a> 

The layer modification seems to be the best way.

<pre><code>UIImageView * roundedView = [[UIImageView alloc] initWithImage: [UIImage imageNamed:@"wood.jpg"]];
// Get the Layer of any view
CALayer * l = [roundedView layer];
[l setMasksToBounds:YES];
[l setCornerRadius:10.0];
</code></pre>

blocks|key|1037926|text|您可以通过UIImageView和CALayer上的简单类别实现更强大的功能，而不是子类化。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1037927|在UIImageView上创建类别，如下所示：|1037928|-+(void)maskRoundCorners:(UIRectCorner)corners+radius:(CGFloat)radius+{
++++//+To+round+all+corners,+we+can+just+set+the+radius+on+the+layer
++++if+(+corners+==+UIRectCornerAllCorners+)+{
++++++++self.layer.cornerRadius+=+radius;
++++++++self.layer.masksToBounds+=+YES;
++++}+else+{
++++++++//+If+we+want+to+choose+which+corners+we+want+to+mask+then
++++++++//+it+is+necessary+to+create+a+mask+layer.
++++++++self.layer.mask+=+[CALayer+maskLayerWithCorners:corners+radii:CGSizeMake(radius,+radius)+frame:self.bounds];
++++}
}|code-block|syntax|javascript|1037929|这将调用CALayer上的category方法：|1037930|%2B+(id)maskLayerWithCorners:(UIRectCorner)corners+radii:(CGSize)radii+frame:(CGRect)frame+{

++++//+Create+a+CAShapeLayer
++++CAShapeLayer+*mask+=+[CAShapeLayer+layer];

++++//+Set+the+frame
++++mask.frame+=+frame;

++++//+Set+the+CGPath+from+a+UIBezierPath
++++mask.path+=+[UIBezierPath+bezierPathWithRoundedRect:mask.bounds+byRoundingCorners:corners+cornerRadii:radii].CGPath;

++++//+Set+the+fill+color
++++mask.fillColor+=+[UIColor+whiteColor].CGColor;

++++return+mask;
}|1037931|因此，这允许你圆角的任何组合(见UIRectCorner)，这是特别方便的，如果你想把一个图像放在一个组风格的UITableView。然而，在这样做的时候有一个警告。因为我们没有继承UIImageView的子类，所以我们不能向layoutSubviews注入任何代码，这意味着遮罩层可能不正确。实际上，在配置单元格时，调用category方法时甚至不会设置图像视图的边界。因此，您需要确保在添加圆角之前设置图像视图的边界(使用UIRectCornersAllCorners时除外)。|offset|length|style|CODE|1037932|下面是实现这一点的一些代码：|1037933|++++++++//+Perform+corner+rounding
++++++++UIRectCorner+corners+=+!UIRectCornerAllCorners;
++++++++if+(indexPath.row+==+0)+
++++++++++++corners+=+UIRectCornerTopLeft;
++++++++if+(indexPath.row+==+numberOfRowsInTheTable)++
++++++++++++corners+%7C=+UIRectCornerBottomLeft;

++++++++if+(corners+>+0)+{
++++++++++++cell.imageView.bounds+=+CGRectMake(0.f,+0.f,+[self.tableView+rowHeight],+[self.tableView+rowHeight]);
++++++++++++[cell.imageView+maskRoundCorners:corners+radius:10.f];
++++++++}+else+{
++++++++++++[cell.imageView+removeRoundCornersMask];
++++++++}|1037934|我有另一个类别，它删除圆角-所有做的是删除任何掩码，并将cornerRadius设置为0。|1037935|entityMap^0|0|0|0|0|0|G|C|1J|B|2J|B|35|E|5X|N|0|0|0|S|C|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|13|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|15|8|@$O|16|P|17|Q|R]|$O|18|P|19|Q|R]|$O|1A|P|1B|Q|R]|$O|1C|P|1D|Q|R]|$O|1E|P|1F|Q|R]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1G|8|@]|9|@]|A|$]]|$1|U|3|V|5|F|7|1H|8|@]|9|@]|A|$G|H]]|$1|W|3|X|5|6|7|1I|8|@$O|1J|P|1K|Q|R]]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|Z|$]]

Rather than subclassing, you can achieve more powerful functionality through simple categories on UIImageView and CALayer.

Create a category on UIImageView like this:

<pre><code>- (void)maskRoundCorners:(UIRectCorner)corners radius:(CGFloat)radius {
 // To round all corners, we can just set the radius on the layer
 if ( corners == UIRectCornerAllCorners ) {
 self.layer.cornerRadius = radius;
 self.layer.masksToBounds = YES;
 } else {
 // If we want to choose which corners we want to mask then
 // it is necessary to create a mask layer.
 self.layer.mask = [CALayer maskLayerWithCorners:corners radii:CGSizeMake(radius, radius) frame:self.bounds];
 }
}
</code></pre>

This calls a category method on CALayer:

<pre><code>+ (id)maskLayerWithCorners:(UIRectCorner)corners radii:(CGSize)radii frame:(CGRect)frame {

 // Create a CAShapeLayer
 CAShapeLayer *mask = [CAShapeLayer layer];

 // Set the frame
 mask.frame = frame;

 // Set the CGPath from a UIBezierPath
 mask.path = [UIBezierPath bezierPathWithRoundedRect:mask.bounds byRoundingCorners:corners cornerRadii:radii].CGPath;

 // Set the fill color
 mask.fillColor = [UIColor whiteColor].CGColor;

 return mask;
}
</code></pre>

So, this allows you to round any combination (see <code>UIRectCorner</code>) of corners, which is especially handy if you want to put an image in a group style <code>UITableView</code>. There is one caveat when doing this however. Because we've not subclassed <code>UIImageView</code>, we cannot inject any code into <code>layoutSubviews</code>, which means that the mask layer may not be correct. In fact, when configuring cells, the bounds of the image view won't even be set when you call the category method. Hence, you need to ensure the bounds of the image view is set before adding rounded corners (except if using <code>UIRectCornersAllCorners</code>).

Here is some code which does this:

<pre><code> // Perform corner rounding
 UIRectCorner corners = !UIRectCornerAllCorners;
 if (indexPath.row == 0) 
 corners = UIRectCornerTopLeft;
 if (indexPath.row == numberOfRowsInTheTable) 
 corners |= UIRectCornerBottomLeft;

 if (corners &gt; 0) {
 cell.imageView.bounds = CGRectMake(0.f, 0.f, [self.tableView rowHeight], [self.tableView rowHeight]);
 [cell.imageView maskRoundCorners:corners radius:10.f];
 } else {
 [cell.imageView removeRoundCornersMask];
 }
</code></pre>

I have another category which removes rounded corners - all that does is remove any masks and set the <code>cornerRadius</code> to 0.

blocks|key|2447410|text|您可以子类化UIImageView，然后如果您实现它的setNeedsDisplay方法，圆角将在子类上工作。(别忘了导入QuartzCore)|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2447411|-(void)setNeedsDisplay+{
++++self.layer.cornerRadius+=+5;
++++self.layer.masksToBounds+=+YES;
++++[self.layer+setBorderColor:[[UIColor+whiteColor]+CGColor]];
++++[self.layer+setBorderWidth:+2.0];
}|code-block|syntax|javascript|2447412|entityMap^0|R|F|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can subclass UIImageView and then if you implement its setNeedsDisplay method the round corners will work on subclasses. (don't forget to import QuartzCore)

<pre><code>-(void)setNeedsDisplay {
 self.layer.cornerRadius = 5;
 self.layer.masksToBounds = YES;
 [self.layer setBorderColor:[[UIColor whiteColor] CGColor]];
 [self.layer setBorderWidth: 2.0];
}
</code></pre>

blocks|key|1037979|text|尝尝这个,|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1037980|coverImage.image+=+[UIImage+imageWithContentsOfFile:@"coverImage.png"];+
coverImage.layer.masksToBounds+=+YES;
coverImage.layer.cornerRadius+=+10.0;
coverImage.layer.borderWidth+=+1.0;
coverImage.layer.borderColor+=+[[UIColor+brown]+CGColor];|code-block|syntax|javascript|1037981|这可能会对你有帮助。|1037982|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Try this,

<pre><code>coverImage.image = [UIImage imageWithContentsOfFile:@"coverImage.png"]; 
coverImage.layer.masksToBounds = YES;
coverImage.layer.cornerRadius = 10.0;
coverImage.layer.borderWidth = 1.0;
coverImage.layer.borderColor = [[UIColor brown] CGColor];
</code></pre>

this may help you.

I would like to add some rounded corners to all of the UIImageViews in my project. I have already got the code working, but am having to apply it to every image; should I subclass UIImageView to add this? If so, can someone give me some pointers as to how to do this?

Here is the code

<pre><code>- (void)viewDidLoad {
 [super viewDidLoad];
 NSString *mainpath = [[NSBundle mainBundle] bundlePath];
 welcomeImageView.image = [UIImage imageWithContentsOfFile:[mainpath stringByAppendingString:@"/test.png"]];
 welcomeImageView.layer.cornerRadius = 9.0;
 welcomeImageView.layer.masksToBounds = YES;
 welcomeImageView.layer.borderColor = [UIColor blackColor].CGColor;
 welcomeImageView.layer.borderWidth = 3.0;
 CGRect frame = welcomeImageView.frame;
 frame.size.width = 100;
 frame.size.height = 100;
 welcomeImageView.frame = frame;
}
</code></pre>

Add rounded corners to all UIImageViews

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想在我的项目中为所有的UIImageViews添加一些圆角。我已经让代码正常工作了，但是我必须将它应用于每个图像；我应该子类UIImageView来添加它吗？如果是这样的话，有人能给我一些关于如何做到这一点的建议吗？以下是代码- (void)viewDidLoad {    [super viewDidLoad]; ...

问向所有UIImageViews添加圆角
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问向所有UIImageViews添加圆角EN