Question

我正在尝试将两个CALayers作为子图层从数组添加到我的视图层。以下代码仅添加了最后尝试的子层（名为q）。我试图让这个在数组中只使用两个，这样我以后可以使用for循环添加尽可能多的数组。有关让两个子图层同时显示的任何建议吗？

ViewController.h是

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

@interface ViewController : UIViewController{
    UIImage *beeImage;

    UIImageView *beeView;
    CALayer *beeLayer;
    CABasicAnimation *animation;

    NSMutableArray *beeArray;

    }

@property(retain,nonatomic) UIImage *beeImage;
@property(retain,nonatomic) NSArray *beeArray;
@property(retain,nonatomic) UIImageView *beeView;
@property(retain,nonatomic) CALayer *beeLayer;
@property(retain,nonatomic)CABasicAnimation *animation;
-(void) animate;
-(void) makeSwarm;

@end

这是ViewController.m

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

-(void) makeSwarm{

    self.view.layer.backgroundColor = [UIColor orangeColor].CGColor;
    self.view.layer.cornerRadius = 20.0;
    self.view.layer.frame = CGRectInset(self.view.layer.frame, 20, 20);

    CGRect beeFrame;
    beeArray = [[NSMutableArray alloc] init];
    beeImage = [UIImage imageNamed:@"bee50x55px.png"];
    beeFrame = CGRectMake(0, 0, beeImage.size.width, beeImage.size.height);
    beeView = [[UIImageView alloc] initWithFrame:beeFrame];
    beeView.image = beeImage;    
    beeLayer = [beeView layer];


    CALayer *p = [[CALayer alloc] init];
    CALayer *q = [[CALayer alloc] init];


    [beeArray addObject: beeLayer];     
    [beeArray addObject: beeLayer];  

    p = [beeArray objectAtIndex: 0];    

    [p setPosition:CGPointMake(10, 10)];
    p.zPosition=0;
    [self.view.layer addSublayer:p];

    q = [beeArray objectAtIndex: 1];    

    [q setPosition:CGPointMake(160,240)];
    q.zPosition=1;
    [self.view.layer insertSublayer:q below:p];        


}

Answer 1

我还不知道如何（或者是否可能）接受评论中留下的答案。因此，为了将此标记为已回答，我将引用第一个正确答案。我很抱歉，如果这不能正确帮助lnafziger在这里代表，但我不知道还能做什么。

lnafziger说......

“可能是因为它是同一个对象。请尝试[beeArray addObject：[beeLayer copy]];而不是.-- lnafziger”

这很有用。非常感谢你。

在Xcode 4中添加多个子图层？只显示一个

1 个答案: