我试图将一些Objective-C代码转换为Swift但是遇到了麻烦。
下面是代码：
@property (nonatomic, strong) NSMutableDictionary* loadedNativeAdViews;
@synthesize loadedNativeAdViews;
...
loadedNativeAdViews = [[NSMutableDictionary alloc] init];
...
nativeAdView = [loadedNativeAdViews objectForKey:@(indexPath.row)];
我如何在swift中写这个？
答案 0 :(得分：1)
Dictionary桥接到Swift本机类NSDictionary，因此您可以在Objective-C中使用UIView的任何位置使用它。有关此问题的详细信息，请查看Working with Cocoa Data Types apple docs。
Swift是类型安全的，因此您必须指定用于键的元素类型和字典中的值。
假设您使用Int将// Declare the dictionary
// [Int: UIView] is equivalent to Dictionary<Int, UIView>
var loadedNativeAdViews = [Int: UIView]()
// Then, populate it
loadedNativeAdViews[0] = UIImageView() // UIImageView is also a UIView
loadedNativeAdViews[1] = UIView()
// You can even populate it in the declaration
// in this case you can use 'let' instead of 'var' to create an immutable dictionary
let loadedNativeAdViews: [Int: UIView] = [
0: UIImageView(),
1: UIView()
]
存储在字典中作为密钥：
let nativeAdView = loadedNativeAdViews[indexPath.row]
然后访问存储在字典中的元素：
{{1}}