objective-c - ios开发遇到的内存过大的问题

Question

import "memoryViewController.h"

import <BmobSDK/Bmob.h>

import "memory.h"

@interface memoryViewController (){

NSMutableArray *theMemory;
NSMutableArray *theHeadPicture;
UIImage * headPicture;

}
@property (weak, nonatomic) IBOutlet UITableView *memoryTableView;

@end

@implementation memoryViewController

pragma mark -- table datasource --

//设置table行数。
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

if([theMemory count]==0)
    return 4;
else {
    NSLog(@"输出%lu行",(unsigned long)[theMemory count]);
    return [theMemory count];
    
}

}
//设置table section数.
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{

return 1;

}
//cell
-(UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

@autoreleasepool {
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"memoryCell"];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"memoryCell"];
    }
    cell.selectionStyle = UITableViewCellSelectionStyleNone;//设置点击cell后的风格
    //configure the cell
    
    if([theMemory count]==0){//加载前
        //主题
        UILabel *headlineLabel = (UILabel *)[cell viewWithTag:1];
        headlineLabel.text = @"正在加载";
        headlineLabel.textColor = [UIColor blackColor];
        //时间
        UILabel *dayLabel = (UILabel *)[cell viewWithTag:2];
        dayLabel.text =@"正在加载";
        dayLabel.textColor = [UIColor blackColor];
    }
    else{//加载后
        memory *aMemory = [[memory alloc]init];
        aMemory =[theMemory objectAtIndex:indexPath.row];
        
        //主题标签
        UILabel *headlineLabel = (UILabel *)[cell viewWithTag:1];
        headlineLabel.text = aMemory.headline;
        headlineLabel.font = [UIFont fontWithName:@"Helvetica" size:30];
        headlineLabel.textColor = [UIColor whiteColor];
        //时间标签
        UILabel *dayLabel = (UILabel *)[cell viewWithTag:2];
        dayLabel.text = [NSString stringWithFormat:@"%@",aMemory.createdAt];
        dayLabel.textColor = [UIColor whiteColor];
        
        //背景
        UIView *testView = [[UIView alloc]init];
        _imgView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 300)];
        NSLog(@"%@",_imgView);
        NSURL *theUrl = [NSURL URLWithString:aMemory.picture1];
        _imgView.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:theUrl]];
        [testView addSubview:_imgView];
        cell.backgroundView = testView;
        //在cell里面设置view。向View里面添加UIImageView
    }
    return cell;
}

}

pragma mark --table delegate --

-(void)tableView:(UITableView )tableView didSelectRowAtIndexPath:(NSIndexPath )indexPath{

[self performSegueWithIdentifier:@"showMemoryDetail" sender:self];

}

pragma mark --getdata --

//获取全部原始数据添加到theMemory里。通过theMemory数组提取出各个cell所需要的信息。
-(void)getData{

@autoreleasepool {
    
    BmobQuery   *bquery = [BmobQuery queryWithClassName:@"memory"];
    //查找GameScore表的数据
    [bquery findObjectsInBackgroundWithBlock:^(NSArray *array, NSError *error) {
        for (BmobObject *obj in array) {
            //打印playerName
            memory *aMemory = [[memory alloc]init];
            aMemory.createdAt = [obj objectForKey:@"createdAt"];
            aMemory.headline = [obj objectForKey:@"headline"];
            BmobFile *photo = [obj objectForKey:@"picture1"];
            NSString *thephoto = photo.url;

// NSURL *url = [NSURL URLWithString:thephoto];
// UIImage * aHeadPicture = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:url]];
// aMemory.picture1 =aHeadPicture;
// [theMemory addObject:aMemory];

            aMemory.picture1 = thephoto;
            [theMemory addObject:aMemory];
        }
        [self.memoryTableView reloadData];
    }];
    
}

}

• (void)viewDidLoad {

  
  [super viewDidLoad];
  theMemory = [NSMutableArray array];
  theHeadPicture = [NSMutableArray array];
  [self getData];
  // Do any additional setup after loading the view.

  }

• (void)didReceiveMemoryWarning {

  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.

  }

异步加载tableViewCell后内存过高，不知道问题出在哪里。我一步一步的检测代码都内存都没有增加，但是一运行起来内存就突然增高。初学者在自己尝试着，有没有知道哪里出问题的呢？我用instruments测试了没有内存泄漏。

Answer 1

Kebocoran pasti akan dikesan, anda perlu sentiasa menguji aplikasi anda

Answer 2

Adakah terdapat sesuatu yang salah dengan tetapan Imej? Mengapa anda perlu menukarnya kepada NSData selepas mendapat URL dan kemudian menukarnya kepada Imej Jika ia adalah imej rangkaian, operasi ini mempunyai masalah puncak memori