#在蓝懿学习iOS的日子#第五个练习日
今天主要复习了昨天学习的文件管理器的知识，由于之前练的比较少，思维逻辑有些跟不上
1、我们要搭建好界面，创建好界面
//创建一个以文件名开头的可变数组
@property (nonatomic,strong)NSMutableArray *filePaths;
@end
@implementation TableViewController
- (void)viewDidLoad {
[super viewDidLoad];
//初始化数组
self.filePaths = [NSMutableArray array];
//判断跳转页面如果是第一次，就是显示固定路径下面的内容
if (!self.directoryPath) {
self.directoryPath = @"/Volumes/文件存放/蓝懿二期";
}
//跳转页面后通过复用显示文件名
self.title=[self.directoryPath lastPathComponent];
//显示的文件夹的路径
NSString*path = self.directoryPath;
//获取文件名，显示
NSFileManager* fm = [NSFileManager defaultManager];
NSArray *fileNames= [fm contentsOfDirectoryAtPath:path error:nil];
//把隐藏文件的过滤
for (NSString*fileName in fileNames) {
//判断文件名以什么开头(hasPrefix)的文件
if (![fileName hasPrefix:@"."]) {
//字符串的拼接
NSString *filePath = [path stringByAppendingPathComponent:fileName];
//把filePath添加到数组里边
[self.filePaths addObject:filePath];
}
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//有多少行
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.filePaths.count;
}
//cell里显示的内容
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
//取到每一行
NSString *filePath = self.filePaths[indexPath.row];
//完整路径的展示 lastPathComponent
cell.textLabel.text = [filePath lastPathComponent];
//判断是否是文件夹显示右箭头
BOOL isDir = NO;
NSFileManager *fm = [NSFileManager defaultManager];
if ([fm fileExistsAtPath:filePath isDirectory:&isDir]&&isDir) {//是文件夹
[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator]
;
//添加图片显示文件夹
cell.imageView.image = [UIImage imageNamed:@"direcotry.png"];
}else{//如果不是文件夹 什么都不显示
[cell setAccessoryType:UITableViewCellAccessoryNone];
//判断是否是什么类型的文件显示的图片
//判断文件名以什么结尾(hasSuffix)的文件
if ([filePath hasSuffix:@".txt"]||[filePath hasSuffix:@".h"]||[filePath hasSuffix:@".m"]||[filePath hasSuffix:@".rtf"]) {
cell.imageView.image =[UIImage imageNamed:@"txt.png"];
}else if([filePath hasSuffix:@".jpg"]||[filePath hasSuffix:@".png"]||[filePath hasSuffix:@".JPG"]||[filePath hasSuffix:@".PNG"]){
cell.imageView.image =[UIImage imageWithContentsOfFile:filePath];
}else{
cell.imageView.image =[UIImage imageNamed:@"other.png"];
}
}
return cell;
}
//当点击某一行cell进去
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
//点击的路径是什么
NSString *filePath = self.filePaths [indexPath.row];
//判断是否是文件夹//跳转页面
BOOL isDir = NO;
NSFileManager *fm = [NSFileManager defaultManager];
if ([fm fileExistsAtPath:filePath isDirectory:&isDir]&&isDir) {//是文件夹
//复用当前页面 要storyboard通过创建 用TableViewController来区分
TableViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"TableViewController"];
//一个页面正向传值
vc.directoryPath = filePath;
[self.navigationController pushViewController:vc animated:YES];
}else{//如果不是文件夹 什么都不显示
//判断文件名以什么结尾(hasSuffix)的文件
if ([filePath hasSuffix:@".txt"]||[filePath hasSuffix:@".h"]||[filePath hasSuffix:@".m"]||[filePath hasSuffix:@".rtf"]) {
//创建空页面显示内容，进行展示
UIViewController*vc = [[UIViewController alloc]init];
UITextView *tv = [[UITextView alloc]initWithFrame:vc.view.bounds];
[vc.view addSubview:tv];
tv.text = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
[self.navigationController pushViewController:vc animated:YES];
}else if([filePath hasSuffix:@".jpg"]||[filePath hasSuffix:@".png"]||[filePath hasSuffix:@".JPG"]||[filePath hasSuffix:@".PNG"]){
//创建空页面显示内容，进行展示
UIViewController*vc = [[UIViewController alloc]init];
//添加背景颜色
vc.view.backgroundColor =[UIColor blackColor];
UIImageView *iv = [[UIImageView alloc]initWithFrame:vc.view.bounds];
[vc.view addSubview:iv];
iv.image = [UIImage imageWithContentsOfFile:filePath];
[iv setContentMode:UIViewContentModeScaleAspectFill];
[self.navigationController pushViewController:vc animated:YES];
}else{//其他文件
//添加 展示
UIAlertController *a = [UIAlertController alertControllerWithTitle:@"提示" message:@"该版本暂不支持此格式，请期待下一版本！" preferredStyle:UIAlertControllerStyleAlert];
[a addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil]];
[self presentViewController:a animated:YES completion:nil];
}
}
}
