文件操作
1. 获取Documents文件夹路径
/**
* 获取Documents文件夹路径
*
* @return 文件夹路径
*/
+ (NSString *)getDocumentsFolderPath{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [paths objectAtIndex:
0];
}
2. 获取Documents文件路径
/**
* 获取Documents文件路径
*
* @param fileName 文件名称
*
* @return 文件路径
*/
+ (NSString *)getDocumentsFilePath:(NSString *)fileName
{
return [[self getDocumentsFolderPath] stringByAppendingPathComponent:fileName];
}
3. 获取一个目录所占的空间大小
/**
* 获取一个目录所占的空间大小
*
* @param filePath 文件目录路径
*
* @return 目录空间大小
*/
+ (
long long)fileSizeAtPath:(NSString*) filePath{
NSFileManager* manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:filePath]){
return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
}
else{
return 0;
}
}
4.文件是否存在
+ (
BOOL)isFileExisted:(
NSString *)fileName{
NSFileManager *fileManager = [
NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:[
self getFilePath:fileName]]){
return NO;
}
return YES;
}
5.创建指定名字的文件
+ (
BOOL)createFileAtPath:(
NSString *)fileName{
NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,
YES);
NSString *path = [[array objectAtIndex:
0] stringByAppendingPathComponent:fileName];
NSLog(@
"-----%@:", path);
NSFileManager *fileManager = [
NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:path]){
[fileManager createFileAtPath:path contents:
nil attributes:
nil];
return YES;
}
return NO;
}
6.创建指定名字的文件夹
+ (
BOOL)createDirectoryAtPath:(
NSString *)fileName{
NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,
YES);
NSString *path = [[array objectAtIndex:
0] stringByAppendingPathComponent:fileName];
NSLog(@
"-----%@:", path);
NSFileManager *fileManager = [
NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:path]){
NSError *error =
nil;
[fileManager createDirectoryAtPath:path withIntermediateDirectories:
YES attributes:
nil error:&error];
return YES;
}
return NO;
}
7.删除文件
+ (
BOOL)deleteFileAtPath:(
NSString *)fileName{
NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,
YES);
NSString *path = [[array objectAtIndex:
0] stringByAppendingPathComponent:fileName];
NSFileManager *fileManager = [
NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:path]){
return NO;
}
[fileManager removeItemAtPath:path error:
nil];
return YES;
}
NSUserDefaults
保存和取出
/**
保存
@param value <#value description#>
@param key <#key description#>
*/
+(
void)saveValue:(id) value forKey:(NSString *)key{
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:value forKey:key];
[userDefaults synchronize];
}
/**
取出
@param key <#key description#>
@return <#return value description#>
*/
+(id)valueForKey:(NSString *)key{
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
return [userDefaults objectForKey:key];
}
/**
根据key取出NSString的value
@param key <#key description#>
@return <#return value description#>
*/
+(id)StringForKey:(NSString *)key{
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
return [userDefaults stringForKey:key];
}
/**
根据key取出Bool型的值
@param key <#key description#>
@return <#return value description#>
*/
+(BOOL)boolValueForKey:(NSString *)key{
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
return [userDefaults boolForKey:key];
}
/**
保存Bool型的值
@param value value
@param key key
*/
+(
void)saveBoolValue:(BOOL)value forKey:(NSString *)key{
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setBool:value forKey:key];
[userDefaults synchronize];
}
/**
获取userDefaults存储的所有信息
*/
+(
void)printAllUserDefault{
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSDictionary *dic = [userDefaults dictionaryRepresentation];
NSLog(@
"%@",dic);
}
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