Swift 和 Objective-c 框架暴露其内部结构

Swift和Objective-C是两种主流的编程语言，被广泛用于iOS和Mac应用程序的开发。这两种语言都有自己的框架，可以暴露其内部结构，使开发人员可以更好地理解和使用这些框架。

swift
import Foundation
let str = "Hello, World!"
let reversedStr = String(str.reversed())
print(reversedStr) // 输出：!dlroW ,olleH

objective-c
#import 
@interface ViewController : UIViewController
@property (nonatomic, strong) UILabel *label;
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 200, 50)];
    self.label.text = @"Hello, Objective-C!";
    self.label.textColor = [UIColor blackColor];
    
    [self.view addSubview:self.label];
}
@end
int main(int argc, char * argv[]) {
    @autoreleasepool {
        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
    }
}