数据存储之plist、偏好设置

// 偏好设置---------------------------------

// 存储基本类型数据

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

[defaults setObject:@"hello world!" forKey:@"testsavekey"];

// 强制保存,否则需要等系统保存，时间不定

[defaults synchronize];

// 取数据

NSString *testStr = [defaults objectForKey:@"testsavekey"];

NSLog(@"testStr = %@", testStr);

// 数据存储plist-----------------------------

// Document路径获取

NSArray *documentPathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentPath = [documentPathArray firstObject];

NSLog(@"document path = %@", documentPath);

NSString *filePath = [documentPath stringByAppendingPathComponent:@"test.plist"];

// 数据写入文件

NSMutableDictionary *dic = [[NSMutableDictionary alloc]initWithCapacity:1];

[dic setObject:@"hello" forKey:@"key1"];

[dic setObject:@"world !" forKey:@"key2"];

[dic writeToFile:filePath atomically:YES];

// 读取数据

NSDictionary *readDic = [NSDictionary dictionaryWithContentsOfFile:filePath];

NSLog(@"readDic = %@", readDic);