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
1. 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] > 0) ? [paths objectAtIndex:0] : 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 = @""; } 2. 解压缩: ZipArchive* zip = [[ZipArchive alloc] init]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentpath = ([paths count] > 0) ? [paths objectAtIndex:0] : 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(100, 100, 200, 200)]; imageView.image=[UIImageimageNamed:@"filter_laozhaopian_a.png"]; imageView.tag = 10000; //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 - 1000)); }
3:自定义self.navigationItem.titleView视图
UIView *titleView=[[UIView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, KTitleViewHeight)]; //最新定义左边的按键 UIButton *leftItemButton=[UIButton buttonWithType:UIButtonTypeCustom]; leftItemButton.frame=CGRectMake(0, 0, 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(5); make.size.equalTo(CGSizeMake(KLeftItemButtonWidth, KLeftItemButtonHeight)); }]; UILabel *titleLabel=[UILabel new]; titleLabel.textAlignment=NSTextAlignmentCenter; titleLabel.font=[UIFont systemFontOfSize:14]; 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-10)/2); }]; 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(-2); make.centerY.equalTo(titleView); make.size.equalTo(CGSizeMake(KTitleViewButtonWidth, KTitleViewButtonHeight)); }]; UILabel *proLabel=[UILabel new]; proLabel.font=[UIFont systemFontOfSize:10]; 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(-5); 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==0) { 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]-1)] atIndex:0]; //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:1]]; //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=0; 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 = 0; 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, 0); // 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>0) { CGFloat pageWidth = _scrollView.frame.size.width; int page = floor((_scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1; _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+1,_actualImgNum]; } else { _imageCount=[NSString stringWithFormat:@"%d/%d",1,_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==0) { [_scrollView setContentOffset:CGPointMake(([self.imgdatalist count]-2)*myscrollView.frame.size.width, 0)]; } if (_currentPageIndex==([self.imgdatalist count]-1)) { [_scrollView setContentOffset:CGPointMake(myscrollView.frame.size.width, 0)]; } } }
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 + 1][@"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 + 1; } NSIndexPath *indexpath = [NSIndexPath indexPathForRow:currentLine inSection:0]; [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 1=2013_50.zip 2=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books 3=zip 4=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50 5=~/Documents/DownLoad/books/2013_50.zip 6=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip 7=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip 8=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip 9=2013_50
