iOS-为圆角矩形创建UIView子类 [英] iOS - Create UIView subclass for rounded rectangle

问题描述

我正在尝试创建&对圆角矩形使用非常简单的UIView子类.我创建了一个新类，如下所示:

I'm trying to create & use a very simple UIView subclass for a rectangle with rounded corners. I've created a new class as follows :

RoundedRect.h

RoundedRect.h

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>

@interface RoundedRect : UIView
@end

RoundedRect.m

RoundedRect.m

#import "RoundedRect.h"

@implementation RoundedRect

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        [[self layer] setCornerRadius:10.0f];
        [[self layer] setMasksToBounds:YES];
    }
    return self;
}
@end

我将iOS 5.1与情节提要板一起使用，并且已将IB检查器窗口中的自定义类属性设置为"RoundedRect"，但是当我运行该应用程序时，矩形仍然具有正方形角.我错过了明显的事情吗?

I'm using iOS 5.1 with storyboards and have set the custom class property in the IB inspector window to 'RoundedRect', but when I run the app the rectangle still has square corners. Have I missed something obvious?

谢谢乔纳森

推荐答案

从XIB文件实例化视图时，不会调用 initWithFrame 方法.而是调用 initWithCoder:初始化程序，因此您需要在此方法中执行相同的初始化.

The initWithFrame method is not called when the view is instantiated from a XIB file. Instead, the initWithCoder: initializer is called, so you need to perform the same initialization in this method.

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