iOS计算App缓存的大小以及清理iOS应用跳转到appstore评分文字加阴影 NSMutableArray到NSData的转化

Posted 2022-12-02 BearsG

一、计算缓存

// 缓存大小
- (CGFloat)folderSize
    CGFloat folderSize;

    //获取路径
    NSString *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)firstObject];

    //获取所有文件的数组
    NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachePath];

    NSLog(@"文件数：%ld",files.count);

    for(NSString *path in files) 

        NSString*filePath = [cachePath stringByAppendingString:[NSString stringWithFormat:@"/%@",path]];

  //累加
        folderSize += [[NSFileManager defaultManager]attributesOfItemAtPath:filePath error:nil].fileSize; 
    
    //转换为M为单位
    CGFloat sizeM = folderSize /1024.0/1024.0;

 return sizeM;

二、清除缓存

- (void)removeCache
    //===============清除缓存==============
    //获取路径
    NSString*cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)objectAtIndex:0];

    //返回路径中的文件数组
    NSArray*files = [[NSFileManager defaultManager]subpathsAtPath:cachePath];

    NSLog(@"文件数：%ld",[files count]);
    for(NSString *p in files)
        NSError*error;

        NSString*path = [cachePath stringByAppendingString:[NSString stringWithFormat:@"/%@",p]];

        if([[NSFileManager defaultManager]fileExistsAtPath:path])
               
            BOOL isRemove = [[NSFileManager defaultManager]removeItemAtPath:path error:&error];
            if(isRemove) 
                NSLog(@"清除成功");
                //这里发送一个通知给外界，外界接收通知，可以做一些操作（比如UIAlertViewController）

            else

                NSLog(@"清除失败");

             
        
    

ios应用跳转到appstore评分

1. 跳转到应用评价页

NSString *urlStr = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%@&pageNumber=0&sortOrdering=2&mt=8", APPID];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlStr]];

2. 跳转到应用详情页

NSString *urlStr = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/app/id%@", APPID];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlStr]];
//appid是在iTunesConnect创建应用时自动生成的ID

Objective-C文字加阴影方法总结

UILabel、UITextField可以直接设置shadow属性：

    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(30, 30, 300, 50)];
    label.text = @"UILabel文字阴影效果";
    //阴影颜色
    label.shadowColor = [UIColor redColor];
    //阴影偏移  x，y为正表示向右下偏移
    label.shadowOffset = CGSizeMake(1, 1);
    [self.view addSubview:label];

阴影可以设置的属性比较少，如果要进行更多的设置，就要在layer层进行设置，但要把背景色设置为透明。比如UITextView，就必须在layer进行设置，因为UITextView没有提供shadow相关的属性（吐槽一下连placeholder属性都没有。。。）

    UITextView *textView = [[UITextView alloc]initWithFrame:CGRectMake(30, 80, 300, 50)];
    textView.backgroundColor = [UIColor clearColor];
    textView.font = [UIFont systemFontOfSize:17];
    [self.view addSubview:textView];
    textView.text = @"UITextView文字阴影效果";
    //阴影透明度
    textView.layer.shadowOpacity = 1.0;
    //阴影宽度
    textView.layer.shadowRadius = 1.0;
    //阴影颜色
    textView.layer.shadowColor = [UIColor redColor].CGColor;
    //映影偏移
    textView.layer.shadowOffset = CGSizeMake(1, 1);

还有一种方案就是利用NSAttributedString属性字符串来设置阴影了，这种方法还可以控制range：

    NSShadow *shadow = [[NSShadow alloc]init];
    shadow.shadowBlurRadius = 1.0;
    shadow.shadowOffset = CGSizeMake(1, 1);
    shadow.shadowColor = [UIColor redColor];
    [_attributedString addAttribute:NSShadowAttributeName
                              value:shadow
                              range:NSMakeRange(1, _attributedString.length-1)];

---

NSMutableArray到NSData的转化

NSArray *array = [NSArray arrayWithObjects:@"1", @"2" ,@"3" ,@"4" ,@"5" ,nil];
NSData *sendData=[NSKeyedArchiver archivedDataWithRootObject:array];


NSArray *aArray = [NSKeyedUnarchiver unarchiveObjectWithData:sendData];
NSLog(@"%@",aArray);