hachinobu

    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(40, 50, 180, 180)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
    UIView *view2 = [[UIView alloc] initWithFrame:CGRectMake(70, 90, 180, 200)];
    view2.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:view2];
    CGRect unionRect = CGRectUnion(view1.frame, view2.frame);
    NSLog(@"unionRect:%@", NSStringFromCGRect(unionRect));
    UIView *unionView = [[UIView alloc] initWithFrame:unionRect];
    unionView.backgroundColor = [UIColor clearColor];

hachinobu

//ローカルな定数
static NSString * const kFirstName = @"hachinobu";

//グローバルな定数
//ヘッダーファイル内で宣言
extern NSString * const FirstName;

//実装ファイルで定義
NSString *const FirstName = @"hachinobu";

hachinobu

NSNumber *intNum = @1;
NSNumber *floatNum = @1.23f;
NSNumber *doubleNum = @1.2345;
NSNumber *boolNum = @YES;
NSNumber *charNum = @'a';
    
int numInt = [intNum intValue];
float numFloat = [floatNum floatValue];
double numDouble = [doubleNum doubleValue];
BOOL numBool = [boolNum boolValue];