第一种方法：获取本地documents路径，library路径，temp路径
NSString*documentsPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
NSString*libraryPath=[NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask,YES)objectAtIndex:0];
NSString*tempPath=NSTemporaryDirectory();
第二种方法：
NSString*DocumentsPath = [NSHomeDirectory()stringByAppendingPathComponent:@"/Documents"];
NSString*LibraryPath = [NSHomeDirectory()stringByAppendingPathComponent:@"/Library"];
NSString*tmpPath = [NSHomeDirectory()stringByAppendingPathComponent:@"/tmp"];
保存一张图片到documents下的ios文件夹中
NSString*imageDir = [NSStringstringWithFormat:@"%@/documents/%@",NSHomeDirectory(),@"ios"];
NSFileManager*fileManager = [NSFileManagerdefaultManager];
if([fileManagerfileExistsAtPath:imageDir]){
NSLog(@"存在");
}else{
NSLog(@"不存在");
//创建文件夹路径
[[NSFileManagerdefaultManager]createDirectoryAtPath:imageDirwithIntermediateDirectories:YES
attributes:nilerror:nil];
}
UIImage*image = [UIImageimageNamed:@"1.png"];//设置一个图片的存储路径
NSString*imagePath = [imageDirstringByAppendingString:@"/aa.png"];//设置一个图片的存储路径
[UIImagePNGRepresentation(image)writeToFile:imagePathatomically:YES];//写入到ios文件夹中
保存 .txt 文件到documents下的ios文件夹中
NSString*imageDir = [NSStringstringWithFormat:@"%@/documents/%@",NSHomeDirectory(),@"ios"];
NSFileManager*fileManager = [NSFileManagerdefaultManager];
if([fileManagerfileExistsAtPath:imageDir]){
NSLog(@"存在");
}else{
NSLog(@"不存在");
//创建文件夹路径
[[NSFileManagerdefaultManager]createDirectoryAtPath:imageDirwithIntermediateDirectories:YES
attributes:nilerror:nil];
}
NSDictionary*dic =@{@"content":@"我是测试的",@"name":@"林毛家"};
NSString*filePath = [imageDirstringByAppendingPathComponent:@"aa.txt"];
NSLog(@"%@",filePath);
if([dicwriteToFile:filePathatomically:YES]) {
NSLog(@"保存成功");
}else{
NSLog(@"保存失败");
}
从Documents读取图片图片
NSString*imgPath = [NSHomeDirectory()stringByAppendingPathComponent:@"/Documents/ios/aa.png"];
UIImage*img = [UIImageimageWithContentsOfFile:imgPath];
遍历Documents下的所有文件名称
NSFileManager*fileManager = [NSFileManagerdefaultManager];
NSString*DocumentsPath = [NSHomeDirectory()stringByAppendingPathComponent:@"/Documents"];//获取本地Documents路径
NSError*error =nil;
NSArray*fileList = [[NSArrayalloc]init];
fileList=[fileManagercontentsOfDirectoryAtPath:DocumentsPatherror:&error];
NSLog(@"%@",fileList);
取出plist文件中的数据
NSString*plistPath = [[NSBundlemainBundle]pathForResource:@"phone"ofType:@"plist"];
NSArray*array = [NSArrayarrayWithContentsOfFile:plistPath];
NSMutableArray*dataSource = [NSMutableArrayarrayWithArray:array];
NSLog(@"%@",dataSource);
NSUserDefaults的使用
NSUserDefaults*UserDefaults=[NSUserDefaultsstandardUserDefaults];
//保存用户头像
UIImage*image=[UIImageimageNamed:@"aa.png"];
[UserDefaultssetObject:UIImagePNGRepresentation(image)forKey:@"image"];
UIImage*Newimage=[UIImageimageWithData:[UserDefaultsobjectForKey:@"image"]];
//保存用户名
[UserDefaultssetObject:@"林毛家"forKey:@"name"];
NSString*name=[UserDefaultsobjectForKey:@"name"];
//判断是否第一次登陆
[UserDefaultssetBool:YESforKey:@"isFirst"];
从bundel获取文件路径
NSString*theupfilePath=[[NSBundlemainBundle]pathForResource:@"aa"ofType:@"gif"];
