在h文件中:
//将json数据暂存在沙盒
+(void)writeToFile:(NSDictionary*)dic WithName:(NSString*)fileName;
//读取预存的json数据
+(NSDictionary*)getDataWithFileName:(NSString*)fileName;
//将字符串转为json格式
+ (NSDictionary*)dictionaryWithJsonString:(NSString*)jsonString;
//删除json文件
+(void)removeJsonFile:(NSString*)fileName;
//遍历沙盒下所有文件
+(void)seekAllFile;
在m文件中：
//将json数据暂存在文件里
+(void)writeToFile:(NSDictionary*)dic WithName:(NSString*)fileName{
NSArray*paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString*path=[pathsobjectAtIndex:0];
NSString*Json_path=[pathstringByAppendingPathComponent:[NSStringstringWithFormat:@"%@.json",fileName]];
NSError*err;
NSData* data=[NSJSONSerializationdataWithJSONObject:dicoptions:NSJSONWritingPrettyPrintederror:&err];
if(err) {
NSLog(@"%@",err);
}
else{
//==写入文件
NSLog(@"%@",[datawriteToFile:Json_pathatomically:YES] ?@"Succeed":@"Failed");
}
}
//读取预存的json数据
+(NSDictionary*)getDataWithFileName:(NSString*)fileName
{
//读取Json
//==Json文件路径
NSArray*paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString*path=[pathsobjectAtIndex:0];
NSString*Json_path=[pathstringByAppendingPathComponent:[NSStringstringWithFormat:@"%@.json",fileName]];
NSData* data=[[NSDataalloc]initWithContentsOfFile:Json_path];
if(data) {
NSError*err;
NSDictionary* dic=[NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingAllowFragmentserror:&err];
if(err) {
NSLog(@"json解析失败：%@",err.userInfo);
}
else{
NSLog(@"解析成功:%@",dic);
returndic;
}
}
else{
NSLog(@"该文件无数据或不存在:%@",Json_path);
}
returnnil;
}
//将字符串转为json格式
+ (NSDictionary*)dictionaryWithJsonString:(NSString*)jsonString {
if(jsonString ==nil) {
returnnil;
}
NSData*jsonData = [jsonStringdataUsingEncoding:NSUTF8StringEncoding];
NSError*err;
NSDictionary*dic = [NSJSONSerializationJSONObjectWithData:jsonData
options:NSJSONReadingMutableContainers
error:&err];
if(err) {
NSLog(@"json解析失败：%@",err);
returnnil;
}
returndic;
}
//删除json文件
+(void)removeJsonFile:(NSString*)fileName
{
NSFileManager* fileM=[NSFileManagerdefaultManager];
NSArray*paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString*path=[pathsobjectAtIndex:0];
NSString*Json_path=[pathstringByAppendingPathComponent:[NSStringstringWithFormat:@"%@.json",fileName]];
BOOLblHave=[[NSFileManagerdefaultManager]fileExistsAtPath:Json_path];
if(!blHave) {
NSLog(@"文件不存在:%@",fileName);
}
else{
NSError* err;
BOOLblDele= [fileMremoveItemAtPath:Json_patherror:&err];
if(!blDele) {
NSLog(@"文件删除失败%@",err.userInfo);
}
}
}
//遍历沙盒下所有文件
+(void)seekAllFile{
//得到沙盒文件夹下的所有文件
NSFileManager*fileManager = [NSFileManagerdefaultManager];
NSString*document=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
NSArray*fileList;
fileList =[fileManagercontentsOfDirectoryAtPath:documenterror:NULL];
for(NSString*fileinfileList) {
NSLog(@"%@",file);
}
}