Question

所以我一直在寻找，虽然有许多线程解释接近我需要的东西，但我仍然无法成功执行我的代码。我在ViewController上有两个集合视图，一个有6个单元格，另一个有32个单元格（4个从上到下，8个跨越）。每个集合视图需要从3个图像的数组中填充，它们是相同的图像，只是不同的颜色，我想随机填充它们。我有两个cell.xib文件，每个集合视图一个。下面是我正在使用的ViewController的.m文件。

#import "FirstViewController.h"
#import "CollectionViewCell.h"
#import "RemotesCollectionCell.h"
#import <stdlib.h>

@interface FirstViewController ()



@end

@implementation FirstViewController


- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    UINib *cellNib = [UINib nibWithNibName:@"CollectionViewCell" bundle:nil];
    [self.headerViewCollection registerNib:cellNib forCellWithReuseIdentifier:@"collectCell"];

    UINib *cellNibRemote = [UINib nibWithNibName:@"RemotesCollectionCell" bundle:nil];
    [self.remoteViewCollection registerNib:cellNibRemote forCellWithReuseIdentifier:@"collectCell"];

    self.headLabel.text=[NSString stringWithFormat:@"H\nE\nA\nD"];
    self.remotesLabel.text = [NSString stringWithFormat:@"R\nE\nM\nO\nT\nE\nS"];

    self.title = [NSString stringWithFormat:@"OTIS"];


}



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

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
    return 1;
};

-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    if(collectionView == self.headerViewCollection){
        return 6;
    }
    else return 32;

};

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"collectCell" forIndexPath:indexPath];



    return cell;

};
@end

这是我的.h文件中的一个cell.xib文件

#import <UIKit/UIKit.h>

@interface RemotesCollectionCell : UICollectionViewCell

@property (strong, nonatomic) IBOutlet UIImageView *remoteImageView;


@end

这是nib的.m文件。

#import "RemotesCollectionCell.h"
#import "FirstViewController.h"

@implementation RemotesCollectionCell

- (void)awakeFromNib {
    // Initialization code

    NSMutableArray *remoteImages = [[NSMutableArray alloc]initWithObjects:[UIImage imageNamed:@"red-gps.png"], [UIImage imageNamed:@"green-gps.png"], [UIImage imageNamed:@"orange-gps.png"], nil];
    _remoteImageView = [[UIImageView alloc]initWithFrame:self.contentView.bounds];
    [self.contentView addSubview:_remoteImageView];

    NSLog(@"%lu", (unsigned long)remoteImages.count);
}


@end

我为所有代码道歉但我希望它能帮助你帮助我，提前谢谢你。请原谅我的菜鸟秀。

Answer 1

//在awakeFromNib方法中定义_remoteImageView.tag = 1;这样你就可以访问cellForIndexPath

了

    - (void)awakeFromNib {
        // Initialization code

        NSMutableArray *remoteImages = [[NSMutableArray alloc]initWithObjects:[UIImage imageNamed:@"red-gps.png"], [UIImage imageNamed:@"green-gps.png"], [UIImage imageNamed:@"orange-gps.png"], nil];
        _remoteImageView = [[UIImageView alloc]initWithFrame:self.contentView.bounds];
_remoteImageView.tag=1;
        [self.contentView addSubview:_remoteImageView];

        NSLog(@"%lu", (unsigned long)remoteImages.count);
    }

//无论何时加载单元格，在随机化数组后加载图像。

      -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
                UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"collectCell" forIndexPath:indexPath];

NSMutableArray *remoteImages = [[NSMutableArray alloc]initWithObjects:@"red-gps.png", @"green-gps.png", @"orange-gps.png", nil];



 int count = (int)[remoteImages count];
    for (int i = 0; i < count; ++i) {
        // Select a random element between i and end of array to swap with.
        int nElements = count - i;
        int n = (arc4random() % nElements) + i;
        [remoteImages exchangeObjectAtIndex:i withObjectAtIndex:n];
    }
NSLog(@"remoteImages=%@",remoteImages);

                UIImageView *imageView = (UIImageView*)[cell.contentView viewWithTag:1];

                imageView.image=[UIImage imageNamed:[remoteImages objectAtIndex:0]];



                return cell;

            };

从两个图像阵列填充2个集合视图

1 个答案: