1.Plist
读取：
if([NSFileManager defaultManager] fileExistsAtPath:filePath]){
NSArray *array = [NSArray alloc] initWithContentsOfFile:filePath];
}
写入：
[array writeToFile:filePath atomically:YES];
2.归档
对应的类需要实现NSCoding,NSCopying
-(id)initWithCoder:(NSCoder *)aDecoder{
self = [super init];/self = [super initWithCoder:aDecoder];
if (self){
foo = [aDecoder decodeObjectForKey:kFooKey];
someInt = [aDecoder decodeIntForKey:kSomeInKey];
someFloat = [aDecoder decodeFloatForKey:kAgeKey];
} return self;}
-(void)encodeWithCoder:(NSCoder *)encoder{
//[super encodeWithCoder:encoder];
[encoder encodeObject:foo forKey:kFooKey];
[encoder encodeInt:someInt forKey:kSomeIntKey];
[encoder encodeFloat:someFloat forKey:kSomeFloat];}
简单归档：
BOOL success = [NSKeyedArchiverArchiveRootObject:object toFile:filePath];
简单解档：
object = [NSKeyedUnarchiver unarchiveObjectWithFile:homePath];
多对象归档
NSMutableData *data = [[NSMutableData alloc] init];
NSKeyArchiver *archiver = [[NSKeyArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:myObject forKey:@"keyValueString"];
[archiver encodeObject:object2 for:@"object2"];
[archiver finishEncoding];
BOOL success = [data writeToFile:@"data.archive" atomically:YES];
多对象解档：
NSData *data = [[NSMutableData alloc] initWithContentsOfFile:filePath];
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc]]initForReadingWithData:data];
object = [unarchiver decoderObjectForKey:kRootKey];
[unarchiver finisthDecoding];