ios - 带圆角的 UIView：我忘记了一些东西

Question

我正在使用最新的 SDK 开发一个 iOS 应用程序。

我有这个自定义 UIView：

#define ANNOTATION_WIDTH 250
#define ANNOTATION_HEIGHT 200

@implementation CustomView

- (id)initwithTitle:(NSString* )title subTitle:(NSString* )subTitle
{
    CGRect annotationFrame =
    CGRectMake(10, 10, ANNOTATION_WIDTH, ANNOTATION_HEIGHT);

    if ([self initWithFrame:annotationFrame])
    {
        self.backgroundColor = [UIColor redColor];
        self.opaque = YES;
        /*
        UILabel* nameLabel =
        [[UILabel alloc] initWithFrame:CGRectMake(0, 0, ANNOTATION_WIDTH, 20.0)];

        nameLabel.backgroundColor = [UIColor whiteColor];
        nameLabel.textAlignment = NSTextAlignmentCenter;
        //nameLabel.text = coordinate.name;
        nameLabel.text = title;
        [nameLabel sizeToFit];
        [nameLabel setFrame: CGRectMake(0,
                                        0,
                                        nameLabel.bounds.size.width + 8.0,
                                        nameLabel.bounds.size.height + 8.0)];
        [self addSubview:nameLabel];

        UILabel* placeLabel =
        [[UILabel alloc] initWithFrame:CGRectMake(25, 0, ANNOTATION_WIDTH, 20.0)];

        placeLabel.backgroundColor = [UIColor whiteColor];
        placeLabel.textAlignment = NSTextAlignmentCenter;
        //placeLabel.text = coordinate.place;
        placeLabel.text = subTitle;
        [placeLabel sizeToFit];
        [placeLabel setFrame:CGRectMake(25,
                                        0,
                                        placeLabel.bounds.size.width + 8.0,
                                        placeLabel.bounds.size.height + 8.0)];
        [self addSubview:placeLabel];
        */
    }

    return self;
}

我将显示一个标题和一个子标题，但现在该代码是注释，因为我正在测试一些东西。

要将此自定义视图添加到 UIViewController 我这样做：

#import "ViewController.h"
#import "CustomView.h"
#import <QuartzCore/QuartzCore.h>

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    CustomView* cView = [[CustomView alloc] initwithTitle:@"Titulo" subTitle:@"Subtitulo"];
    cView.layer.cornerRadius = 10;
    cView.layer.masksToBounds = YES;

    [self.view addSubview:cView];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

如果我没有显示标题和子标题，也没有看到我的 customView，但我显示了标题和子标题，我只会看到圆角的左上角。

我也试过这个，但它不起作用：

CustomView* cView = [[CustomView alloc] initwithTitle:@"Titulo" subTitle:@"Subtitulo"];
cView.layer.cornerRadius = 10;
cView.clipsToBounds = YES;

有没有办法在不添加任何子视图的情况下显示带有圆角的 UIView？

我不知道发生了什么，我也不知道为什么我只得到圆角左上角。

Answer 1

你试过这个吗

[self.layer setCornerRadius:10];
[self.layer setMasksToBounds:YES];

Answer 2

试试这个：

cView.layer.cornerRadius = 10.0f;
cView.layer.masksToBounds = YES;
cView.layer.opaque = NO;
[self.view addSubview:cView];