SEWUserDefaults

### 使用 FMDB 实现的 UserDefaults。

SEWUserDefaults *userDefaults = [SEWUserDefaults standardUserDefaults];

{
    NSString *string = @"string", *stringKey = @"stringKey";
    BOOL result = [userDefaults setObject:string forKey:stringKey];
    if (result) {
        NSLog(@"Object:%@ Key:%@ save success.", string, stringKey);
    } else {
        NSLog(@"Object:%@ Key:%@ save fail.", string, stringKey);
    }
    NSString *string2 = [userDefaults stringForKey:stringKey];
    NSLog(@"string:%@ for key:%@", string2, stringKey);
}

{
    NSInteger integer = 1234;
    NSString *integerKey = @"integerKey";
    BOOL result = [userDefaults setInteger:integer forKey:integerKey];
    if (result) {
        NSLog(@"Integer:%@ Key:%@ save success.", @(integer), integerKey);
    } else {
        NSLog(@"Integer:%@ Key:%@ save fail.", @(integer), integerKey);
    }
    NSInteger integer2 = [userDefaults integerForKey:integerKey];
    NSLog(@"integer:%@ for key:%@", @(integer2), integerKey);
}

{
    float floatNum = 1234.1234;
    NSString *floatKey = @"floatKey";
    BOOL result = [userDefaults setFloat:floatNum forKey:floatKey];
    if (result) {
        NSLog(@"Float:%@ Key:%@ save success.", @(floatNum), floatKey);
    } else {
        NSLog(@"Float:%@ Key:%@ save fail.", @(floatNum), floatKey);
    }
    float floatNum2 = [userDefaults floatForKey:floatKey];
    NSLog(@"float:%@ for key:%@", @(floatNum2), floatKey);
}

{
    double doubleNum = 1234567.1234567;
    NSString *doubleKey = @"doubleKey";
    BOOL result = [userDefaults setDouble:doubleNum forKey:doubleKey];
    if (result) {
        NSLog(@"Double:%@ Key:%@ save success.", @(doubleNum), doubleKey);
    } else {
        NSLog(@"Double:%@ Key:%@ save fail.", @(doubleNum), doubleKey);
    }
    double doubleNum2 = [userDefaults doubleForKey:doubleKey];
    NSLog(@"double:%@ for key:%@", @(doubleNum2), doubleKey);
}

{
    BOOL boolVar = YES;
    NSString *boolKey = @"boolKey";
    BOOL result = [userDefaults setBool:boolVar forKey:boolKey];
    if (result) {
    NSLog(@"BOOL:%@ Key:%@ save success.", @(boolVar), boolKey);
    } else {
        NSLog(@"BOOL:%@ Key:%@ save fail.", @(boolVar), boolKey);
    }
    BOOL boolVar2 = [userDefaults boolForKey:boolKey];
    NSLog(@"bool:%@ for key:%@", @(boolVar2), boolKey);
}