IOS开发基础知识--碎片14

1:ZIP文件压缩跟解压,使用ZipArchive

创建/添加一个zip包

ZipArchive* zipFile = [[ZipArchive alloc] init];

//次数得zipfilename需要一个完整得路径，例如***/Documents/demo.zip

[zipFile CreateZipFile2:@"zipfilename"]; 

//有两种可选得方式进行创建压缩包，带密码和不带密码的

[[zipFile CreateZipFile2:@"zipfilename" Password:@"your password"];

//接下来就是将需要压缩的文件添加到这个压缩包中

//这里第一个参数需要完整的路径,例如:***/Documents/a.txt  newname是指文件在压缩包中的名字,不需要路径，只是一个名称

[zipFile addFileToZip:@"fullpath of the file" newname:@"new name of the file without path"];

//如果需要将多个文件进行压缩,即压缩文件夹，重复addFileToZip方法即可

[zipFile CloseZipFile2];

解压zip包：

ZipArchive* zipFile = [[ZipArchive alloc] init];

[zipFile UnzipOpenFile:@"zip file name"]; 

//同样，对应的就有两种打开zip包的方式，带密码和不带密码

[zipFile UnzipOpenFile:@"zip file name" Password:@"password" ];

//压缩包释放到的位置，需要一个完整路径 

[zipFile UnzipFileTo:@"output path" overwrite:YES];

[zipFile UnzipCloseFile];

[zipFile release];

//记得释放

. 压缩:ZipArchive可以压缩多个文件,只需要把文件一一addFileToZip即可.

ZipArchive* zip = [[ZipArchive alloc] init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentpath = ([paths count] > ) ? [paths objectAtIndex:] : nil;
NSString* l_zipfile = [documentpath stringByAppendingString:@"/test.zip"] ;

NSString* image1 = [documentpath stringByAppendingString:@"/image1.jpg"] ;
NSString* image2 = [documentpath stringByAppendingString:@"/image2.jpg"] ;       

BOOL ret = [zip CreateZipFile2:l_zipfile];
ret = [zip addFileToZip:image1 newname:@"image1.jpg"];
ret = [zip addFileToZip:image2 newname:@"image2.jpg"];
if( ![zip CloseZipFile2] )
  {
     l_zipfile = @"";
  }

. 解压缩:

ZipArchive* zip = [[ZipArchive alloc] init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentpath = ([paths count] > ) ? [paths objectAtIndex:] : nil;  //路径地址要注意

NSString* l_zipfile = [documentpath stringByAppendingString:@"/test.zip"] ;
NSString* unzipto = [documentpath stringByAppendingString:@"/test"] ;
if( [zip UnzipOpenFile:l_zipfile] )
 {
   BOOL ret = [zip UnzipFileTo:unzipto overWrite:YES];
   if( NO==ret )
   {
   }
   [zip UnzipCloseFile];
 }

2:UITapGestureRecognizer传值

UIImageView *imageView =[[UIImageView alloc]initWithFrame:CGRectMake(, , , )];

    imageView.image=[UIImageimageNamed:@"filter_laozhaopian_a.png"];

    imageView.tag = ;  //可以通过这样来给下边的点击事件传值

    imageView.userInteractionEnabled = YES;

    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizeralloc] initWithTarget:selfaction:@selector(UesrClicked:)];

    [imageView addGestureRecognizer:singleTap];

    [self.view addSubview:imageView];

- (void)UesrClicked:(UITapGestureRecognizer *)recognizer
{
   NSLog(@"%d",(recognizer.view.tag - ));
} 

 3:自定义self.navigationItem.titleView视图

UIView *titleView=[[UIView alloc] initWithFrame:CGRectMake(, , SCREEN_WIDTH, KTitleViewHeight)];

    //最新定义左边的按键
    UIButton *leftItemButton=[UIButton buttonWithType:UIButtonTypeCustom];
    leftItemButton.frame=CGRectMake(, , KLeftItemButtonWidth, KLeftItemButtonHeight);
    [leftItemButton setBackgroundImage:[UIImage imageNamed:@"mapMarkNormal"] forState:UIControlStateNormal];
    [leftItemButton setBackgroundImage:[UIImage imageNamed:@"mapMarkSelected"] forState:UIControlStateHighlighted];
    [leftItemButton addTarget:self action:@selector(leftButtonAction) forControlEvents:UIControlEventTouchUpInside];
    [titleView addSubview:leftItemButton];
    [leftItemButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(titleView);
        make.left.equalTo(titleView.mas_left).with.offset();
        make.size.equalTo(CGSizeMake(KLeftItemButtonWidth, KLeftItemButtonHeight));
    }];

    UILabel *titleLabel=[UILabel new];
    titleLabel.textAlignment=NSTextAlignmentCenter;
    titleLabel.font=[UIFont systemFontOfSize:];
    titleLabel.text=@"厦山中华公园广场";
    [titleView addSubview:titleLabel];
    [titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(titleView);
        make.left.equalTo(titleView.mas_left).with.offset((SCREEN_WIDTH-KTitleViewTitleWidte-)/);
    }];

    UIButton *downButton=[UIButton new];
    [downButton setImage:[UIImage imageNamed:@"FileDownload"] forState:UIControlStateNormal];
    [titleView addSubview:downButton];
    [downButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.right.equalTo(titleView.mas_right).with.offset(-);
        make.centerY.equalTo(titleView);
        make.size.equalTo(CGSizeMake(KTitleViewButtonWidth, KTitleViewButtonHeight));
    }];

    UILabel *proLabel=[UILabel new];
    proLabel.font=[UIFont systemFontOfSize:];
    proLabel.textColor=[UIColor colorWithHexString:KWitTourism_AppTextColor];
    proLabel.textAlignment=NSTextAlignmentRight;
    proLabel.text=@"正在下载";
    [titleView addSubview:proLabel];

    [proLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.right.equalTo(downButton.mas_left).with.offset(-);
        make.centerY.equalTo(titleView);
        make.size.equalTo(CGSizeMake(KTitleViewLabelWidth, KTitleViewLabelHeight));
    }];

    self.navigationItem.titleView=titleView;

4:实现无限滚动的uiscrollview

对滚动的图片数组头尾各增加一张，头则在其前面增加一张尾部的，尾部则插入一张第一张；并在滚动事件中进行处理，改变其位置；主体代码如下（若不自写也可以找相应插件，已封装）：

/**
 *  @author wujunyang, 15-06-05 13:06:12
 *
 *  @brief  头部滚动视图布局
 */
-(void)setupScrollView
{
    int imgCount=self.imgdatalist.count;

    //如果没有值时 用一张默认的图片替换显示
    if (imgCount==) {
        UIImageView *featureImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"thirdEmpty"]];
        featureImageView.frame=self.headerImageView.frame;
        [self.headerImageView addSubview:featureImageView];
    }
    else{
        //实际的图片个数
        _actualImgNum=self.imgdatalist.count;
        //为实现无限滚动 首先在第一个前面插入一个元素 此元素为最后一个
        [self.imgdatalist insertObject:[self.imgdatalist objectAtIndex:([self.imgdatalist count]-)] atIndex:];
        //在第后一个增加一个原先的第一个 由于上面已被插入一个值 所以原先的第一个变成第二个 所以此处为1
        [self.imgdatalist addObject:[self.imgdatalist objectAtIndex:]];
        //增加后的个数 用于处理定义滚动视图内容的总宽度
        int imagDataListCount=self.imgdatalist.count;

        _scrollView=[[UIScrollView alloc]init];
        _scrollView.frame=self.headerImageView.frame;

        for (int i=; i<self.imgdatalist.count; i++) {
            AroundImgBean* aroundimgbean=[self.imgdatalist objectAtIndex:i];
            // 获取图片
            NSString *featureImageName = aroundimgbean.aroundimgurl;
            UIImageView *featureImageView = [[UIImageView alloc] init];
            [featureImageView sd_setImageWithURL:[NSURL URLWithString:featureImageName] placeholderImage:[UIImage imageNamed:@"thirdEmpty"]];

            // 设置图片尺寸位置
            CGFloat featureWidth = SCREEN_WIDTH;
            CGFloat featureHeight = self.headerImageView.frame.size.height;
            CGFloat featureX = SCREEN_WIDTH * i;
            CGFloat featureY = ;
            featureImageView.frame = CGRectMake(featureX, featureY, featureWidth, featureHeight);
            [_scrollView addSubview:featureImageView];
        }

        // 设置scrollView功能属性
        _scrollView.userInteractionEnabled = YES;
        _scrollView.bounces=NO;
        _scrollView.scrollEnabled = YES; // 支持滚动
        _scrollView.contentSize = CGSizeMake(self.headerImageView.frame.size.width * imagDataListCount, ); // 只需要水平滚动
        _scrollView.pagingEnabled = YES; // 支持分页
        _scrollView.showsHorizontalScrollIndicator = NO; // 隐藏水平滚动条

        // 设置代理
        _scrollView.delegate = self;

        // 添加
        [self.headerImageView addSubview:_scrollView];
    }
}

//滚动事件
- (void)scrollViewDidScroll:(UIScrollView *)myscrollView {
    if ([myscrollView isEqual:_scrollView]) {
    // 四舍五入，让图片滚动超过中线的时候改变页码
    if (self.imgdatalist.count>) {
        CGFloat pageWidth = _scrollView.frame.size.width;
        int page = floor((_scrollView.contentOffset.x - pageWidth / ) / pageWidth) + ;
        _currentPageIndex=page;

        //当前页数要是没有超过实际的值时
        if (_currentPageIndex<_actualImgNum) {
            _imageCount=[NSString stringWithFormat:@"%d/%d",_currentPageIndex+,_actualImgNum];
        }
        else
        {
            _imageCount=[NSString stringWithFormat:@"%d/%d",,_actualImgNum];
        }

        self.imageLabel.text=_imageCount;
    }
    else
    {
        _imageCountView.hidden=YES;
        _imageLabel.hidden=YES;
    }
    }
}

/**
 *  @author wujunyang, 15-06-05 11:06:06
 *
 *  @brief  滚动事件处理 无限滚动 修改滚动的当前位置
 *  @param myscrollView <#myscrollView description#>
 */
- (void)scrollViewDidEndDecelerating:(UIScrollView *)myscrollView
{
    if ([myscrollView isEqual:_scrollView]) {
        if (_currentPageIndex==) {

            [_scrollView setContentOffset:CGPointMake(([self.imgdatalist count]-)*myscrollView.frame.size.width, )];
        }
        if (_currentPageIndex==([self.imgdatalist count]-)) {

            [_scrollView setContentOffset:CGPointMake(myscrollView.frame.size.width, )];
        }
    }
}

5：IOS开发实现歌词自动滚动功能一种实现方式

 _timer = [NSTimer scheduledTimerWithTimeInterval:0.09f target:self selector:@selector(rollLyc) userInfo:nil repeats:YES];

- (void)rollLyc
{
    CGFloat currentTime = _audio.currentTime;
    CGFloat lycTime = [_lycList[currentLine + ][@"time"] floatValue];//_lycList是存储有每句歌词和对应的时间的字典集合  currentLine设置为成员变量，在ViewDidLoad中初始为0

    NSLog(@"%f --- %f ",currentTime,lycTime);

    if (currentTime >= lycTime) {
        currentLine = currentLine + ;
    }
    NSIndexPath *indexpath = [NSIndexPath indexPathForRow:currentLine inSection:];
    [self.tableView selectRowAtIndexPath:indexpath animated:YES scrollPosition:UITableViewScrollPositionMiddle];
}

6:iOS 从url中获取文件名以及后缀

//这里有一个模拟器沙盒路径(完整路径)

NSString* index=@"/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip";

对路径截取的9种操作

    NSLog(@"1=%@",[index lastPathComponent]);

    NSLog(@"2=%@",[index stringByDeletingLastPathComponent]);

    NSLog(@"3=%@",[index pathExtension]);

    NSLog(@"4=%@",[index stringByDeletingPathExtension]);

    NSLog(@"5=%@",[index stringByAbbreviatingWithTildeInPath]);

    NSLog(@"6=%@",[index stringByExpandingTildeInPath]);

    NSLog(@"7=%@",[index stringByStandardizingPath]);

    NSLog(@"8=%@",[index stringByResolvingSymlinksInPath]);

    NSLog(@"9=%@",[[index lastPathComponent] stringByDeletingPathExtension]);

对应结果

 =2013_50.zip

 =/Users/junzoo/Library/Application Support/iPhone Simulator/7.0./Applications/63925F20-AF97--AF1C-B6B4157D1D92/Documents/DownLoad/books

=zip

 =/Users/junzoo/Library/Application Support/iPhone Simulator/7.0./Applications/63925F20-AF97--AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50

=~/Documents/DownLoad/books/2013_50.zip

 =/Users/junzoo/Library/Application Support/iPhone Simulator/7.0./Applications/63925F20-AF97--AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip

 =/Users/junzoo/Library/Application Support/iPhone Simulator/7.0./Applications/63925F20-AF97--AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip

=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0./Applications/63925F20-AF97--AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip

=2013_50