先上自己整理的 , 原生得找不到方法就NS了下
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func saveArrayToPlist (fileName:String,array:[Any])
let path = NSSearchPathForDirectoriesInDomains (FileManager .SearchPathDirectory .documentDirectory, FileManager .SearchPathDomainMask .userDomainMask, true ).first
if path == nil {return }
let fileURLString = path! + "/\(fileName) .plist"
(array as NSArray ).write(toFile: fileURLString, atomically: true )
}
func addArrayToPlist (fileName:String,text:String)
let path = NSSearchPathForDirectoriesInDomains (FileManager .SearchPathDirectory .documentDirectory, FileManager .SearchPathDomainMask .userDomainMask, true ).first
if path == nil {return }
let fileURLString = path! + "/\(fileName) .plist"
var oldArr = self .redArrayToPlist(fileName: fileName)
for i in 0 ..< oldArr.count {
if (oldArr[i] as ! String ) == text{
oldArr.remove(at: i)
oldArr.insert(text, at: 0 )
(oldArr as NSArray ).write(toFile: fileURLString, atomically: true )
return
}
}
oldArr.insert(text, at: 0 )
(oldArr as NSArray ).write(toFile: fileURLString, atomically: true )
}
func redArrayToPlist (fileName:String) Any ]{
let path = NSSearchPathForDirectoriesInDomains (FileManager .SearchPathDirectory .documentDirectory, FileManager .SearchPathDomainMask .userDomainMask, true ).first
if path == nil {return []}
let fileURLString = path! + "/\(fileName) .plist"
let array = NSArray (contentsOfFile: fileURLString)
return array == nil ?[]:array as ! [Any ]
}
func removeArrayToPlist (fileName:String)
let path = NSSearchPathForDirectoriesInDomains (FileManager .SearchPathDirectory .documentDirectory, FileManager .SearchPathDomainMask .userDomainMask, true ).first
if path == nil {return }
let fileURLString = path! + "/\(fileName) .plist"
try ? FileManager .default .removeItem(atPath: fileURLString)
}
2 配置文件swift3
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let dic: NSDictionary ? = UserDefaults .standard.object(forKey: "UserInfo" ) as ? NSDictionary
UserDefaults .standard.set (UserDataDic , forKey: "UserInfo" )
UserDefaults .standard.synchronize()
copy 的一些
#概论
plist文件（属性列表）
##沙盒
###1.结构
“应用程序包”
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Documents
Library
Caches
Preferences
tmp
###2.目录特性
“应用程序包”: 这里面存放的是应用程序的源文件，包括资源文件和可执行文件。
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NSString *path = [[NSBundle mainBundle] bundlePath];
NSLog (@"%@" , path);
Documents: 最常用的目录，iTunes同步该应用时会同步此文件夹中的内容，适合存储重要数据。
NSString *path = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory , NSUserDomainMask , YES ).firstObject;
NSLog (@"%@" , path);
Library/Caches: iTunes不会同步此文件夹，适合存储体积大，不需要备份的非重要数据。
NSString *path = NSSearchPathForDirectoriesInDomains (NSCachesDirectory , NSUserDomainMask , YES ).firstObject;
NSLog (@"%@" , path);
Library/Preferences: iTunes同步该应用时会同步此文件夹中的内容，通常保存应用的设置信息。
tmp: iTunes不会同步此文件夹，系统可能在应用没运行时就删除该目录下的文件，所以此目录适合保存应用中的一些临时文件，用完就删除。
NSString *path = NSTemporaryDirectory ();
NSLog (@"%@" , path);
plist文件
plist文件是将某些特定的类，通过XML文件的方式保存在目录中。
可以被序列化的类型只有如下几种：
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NSArray ;
NSMutableArray ;
NSDictionary ;
NSMutableDictionary ;
NSData ;
NSMutableData ;
NSString ;
NSMutableString ;
NSNumber ;
NSDate ;
1. 获得文件路径
NSString *path = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory , NSUserDomainMask , YES ).firstObject;
NSString *fileName = [path stringByAppendingPathComponent:@"123.plist" ];
2. 存储
NSArray *array = @[@"123" , @"456" , @"789" ];
[array writeToFile:fileName atomically:YES ];
3. 读取
NSArray *result = [NSArray arrayWithContentsOfFile:fileName];
NSLog (@"%@" , result);
4.注意
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//1 .获得NSUserDefaults文件
NSUserDefaults *user Defaults = [NSUserDefaults standardUserDefaults];
//2 .向文件中写入内容
[user Defaults set Object:@"AAA" for Key:@"a" ];
[user Defaults set Bool:YES for Key:@"sex" ];
[user Defaults set Integer:21 for Key:@"age" ];
//2.1 立即同步
[user Defaults synchronize];
//3 .读取文件
NSString *name = [user Defaults objectForKey:@"a" ];
BOOL sex = [user Defaults boolForKey:@"sex" ];
NSInteger age = [user Defaults integerForKey:@"age" ];
NSLog(@"%@, %d, %ld" , name, sex, age);
2.注意
1.遵循NSCoding协议
遵循协议和设置属性
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@interface Person : NSObject <NSCoding >
@property (strong , nonatomic ) UIImage *avatar;
@property (copy , nonatomic ) NSString *name;
@property (assign , nonatomic ) NSInteger age;
@end
实现协议方法
- (id )initWithCoder:(NSCoder *)aDecoder {
if ([super init]) {
self .avatar = [aDecoder decodeObjectForKey:@"avatar" ];
self .name = [aDecoder decodeObjectForKey:@"name" ];
self .age = [aDecoder decodeIntegerForKey:@"age" ];
}
return self ;
}
- (void )encodeWithCoder:(NSCoder *)aCoder {
[aCoder encodeObject:self .avatar forKey:@"avatar" ];
[aCoder encodeObject:self .name forKey:@"name" ];
[aCoder encodeInteger:self .age forKey:@"age" ];
}
特别注意
如果需要归档的类是某个自定义类的子类时，就需要在归档和解档之前先实现父类的归档和解档方法。即 [super encodeWithCoder:aCoder] 和 [super initWithCoder:aDecoder] 方法;
2.使用
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NSString *file = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory , NSUserDomainMask , YES ).firstObject stringByAppendingPathComponent:@"person.data" ];
Person *person = [[Person alloc] init];
person.avatar = self .avatarView.image;
person.name = self .nameField.text;
person.age = [self .ageField.text integerValue];
[NSKeyedArchiver archiveRootObject:person toFile:file];
需要从文件中解档对象就调用NSKeyedUnarchiver 的一个工厂方法 unarchiveObjectWithFile: 即可。
NSString *file = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory , NSUserDomainMask , YES ).firstObject stringByAppendingPathComponent:@"person.data" ];
Person *person = [NSKeyedUnarchiver unarchiveObjectWithFile:file];
if (person) {
self .avatarView.image = person.avatar;
self .nameField.text = person.name;
self .ageField.text = [NSString stringWithFormat:@"%ld" , person.age];
}
3.注意
1.字段类型
integer : 整数
准备工作
3.使用
操作数据库之前必须先指定数据库文件和要操作的表，所以使用SQLite3，首先要打开数据库文件，然后指定或创建一张表。
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* 打开数据库并创建一个表
*/
- (void )openDatabase {
NSString *filename = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory , NSUserDomainMask , YES ).firstObject stringByAppendingPathComponent:@"person.db" ];
NSInteger result = sqlite3_open(filename.UTF8String, &_sqlite3);
if (result == SQLITE_OK) {
NSLog (@"打开数据库成功！" );
char *errmsg = NULL ;
sqlite3_exec(_sqlite3, "CREATE TABLE IF NOT EXISTS t_person(id integer primary key autoincrement, name text, age integer)" , NULL , NULL , &errmsg);
if (errmsg) {
NSLog (@"错误：%s" , errmsg);
} else {
NSLog (@"创表成功！" );
}
} else {
NSLog (@"打开数据库失败！" );
}
}
执行指令
使用 sqlite3_exec() 方法可以执行任何SQL语句，比如创表、更新、插入和删除操作。但是一般不用它执行查询语句，因为它不会返回查询到的数据。
* 往表中插入1000条数据
*/
- (void )insertData {
NSString *nameStr;
NSInteger age;
for (NSInteger i = 0 ; i < 1000 ; i++) {
nameStr = [NSString stringWithFormat:@"Bourne-%d" , arc4random_uniform(10000 )];
age = arc4random_uniform(80 ) + 20 ;
NSString *sql = [NSString stringWithFormat:@"INSERT INTO t_person (name, age) VALUES('%@', '%ld')" , nameStr, age];
char *errmsg = NULL ;
sqlite3_exec(_sqlite3, sql.UTF8String, NULL , NULL , &errmsg);
if (errmsg) {
NSLog (@"错误：%s" , errmsg);
}
}
NSLog (@"插入完毕！" );
}
查询指令
前面说过一般不使用 sqlite3_exec() 方法查询数据。因为查询数据必须要获得查询结果，所以查询相对比较麻烦。示例代码如下：
sqlite3_prepare_v2() : 检查sql的合法性
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* 从表中读取数据到数组中
*/
- (void)readData {
NSMutableArray *mArray = [NSMutableArray arrayWithCapacity:1000 ]
char *sql = "select name, age from t_person;"
sqlite3_stmt *stmt;
NSInteger result = sqlite3_prepare_v2(_sqlite3, sql, -1 , &stmt, NULL)
if (result == SQLITE_OK) {
while (sqlite3_step(stmt) == SQLITE_ROW) {
char *name = (char *)sqlite3_column_text(stmt, 0 )
NSInteger age = sqlite3_column_int(stmt, 1 )
//创建对象
Person *person = [Person personWithName:[NSString stringWithUTF8String:name] Age:age]
[mArray addObject:person];
}
self.dataList = mArray;
}
sqlite3_finalize(stmt);
}
4.总结
FMDB
使用起来更加面向对象，省去了很多麻烦、冗余的C语言代码
2.核心类
FMDatabase
FMResultSet
FMDatabaseQueue
3.打开数据库
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NSString *path = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory , NSUserDomainMask , YES ).firstObject stringByAppendingPathComponent:@"person.db" ];
FMDatabase *database = [FMDatabase databaseWithPath:path];
if (![database open]) {
NSLog (@"数据库打开失败！" );
}
值得注意的是，Path的值可以传入以下三种情况：
具体文件路径，如果不存在会自动创建
空字符串@””，会在临时目录创建一个空的数据库，当FMDatabase连接关闭时，数据库文件也被删除
nil，会创建一个内存中临时数据库，当FMDatabase连接关闭时，数据库会被销毁
4.更新
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- (BOOL)executeUpdate: (NSString*)sql, ...
- (BOOL)executeUpdateWithFormat: (NSString*)format, ...
- (BOOL)executeUpdate: (NSString*)sql withArgumentsInArray: (NSArray *)arguments
[database executeUpdate: @"CREATE TABLE IF NOT EXISTS t_person(id integer primary key autoincrement, name text, age integer)" ];
[database executeUpdate: @"INSERT INTO t_person(name, age) VALUES(?, ?)" , @"Bourne" , [NSNumber numberWithInt: 42 ]];
5. 查询
查询方法也有3 种，使用起来相当简单：
- (FMResultSet *)executeQuery: (NSString*)sql, ...
- (FMResultSet *)executeQueryWithFormat: (NSString*)format, ...
- (FMResultSet *)executeQuery: (NSString *)sql withArgumentsInArray: (NSArray *)arguments
查询示例：
FMResultSet *result = [database executeQuery: @"SELECT * FROM t_person" ];
while ([result next]) {
NSString *name = [result stringForColumn: @"name" ];
int age = [result intForColumn: @"age" ];
}
6.线程安全
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创建队列。
FMDatabaseQueue *queue = [FMDatabaseQueue databaseQueueWithPath: aPath];
使用队列
[queue inDatabase: ^(FMDatabase *database) {
[database executeUpdate: @"INSERT INTO t_person(name, age) VALUES (?, ?)" , @"Bourne_1" , [NSNumber numberWithInt: 1 ]];
[database executeUpdate: @"INSERT INTO t_person(name, age) VALUES (?, ?)" , @"Bourne_2" , [NSNumber numberWithInt: 2 ]];
[database executeUpdate: @"INSERT INTO t_person(name, age) VALUES (?, ?)" , @"Bourne_3" , [NSNumber numberWithInt: 3 ]];
FMResultSet *result = [database executeQuery: @"select * from t_person" ];
while ([result next]) {
}
}];
而且可以轻松地把简单任务包装到事务里：
[queue inTransaction: ^(FMDatabase *database, BOOL *rollback) {
[database executeUpdate: @"INSERT INTO t_person(name, age) VALUES (?, ?)" , @"Bourne_1" , [NSNumber numberWithInt: 1 ]];
[database executeUpdate: @"INSERT INTO t_person(name, age) VALUES (?, ?)" , @"Bourne_2" , [NSNumber numberWithInt: 2 ]];
[database executeUpdate: @"INSERT INTO t_person(name, age) VALUES (?, ?)" , @"Bourne_3" , [NSNumber numberWithInt: 3 ]];
FMResultSet *result = [database executeQuery: @"select * from t_person" ];
while ([result next]) {
}
*rollback = YES;
}];
FMDatabaseQueue 后台会建立系列化的G-C-D队列，并执行你传给G-C-D队列的块。这意味着 你从多线程同时调用调用方法，GDC也会按它接收的块的顺序来执行。
文／伯恩的遗产（简书作者）http://www.jianshu.com/p/7616cbd72845