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  1. 1. associatedtype

associatedtype

关联类型:代指变量
associatedtype 用于protocol中.
associatedtype类型是protoc
ol中32代指一个确定类型并要求改类型实现指定方法

Swift 标准库中有许多 protocols，其中很多看起来貌似很抽象，并且感觉并没有什么卵用，RawRepresentable 就是其中之一，也

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public protocol RawRepresentable {
    associatedtype RawValue
    public init?(rawValue: Self.RawValue)
    public var rawValue: Self.RawValue { get }
}

CustomStringConvertible协议

internal(set)
苹果
Tips

RunLoop

AFNetworking的做法
开启一个不死线程(线程保活)

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AFURLConnectionOperation
+ (NSThread *)networkRequestThread {
    static NSThread *_networkRequestThread = nil;
    static dispatch_once_t oncePredicate;
    dispatch_once(&oncePredicate, ^{
        _networkRequestThread = [[NSThread alloc] initWithTarget:self selector:@selector(networkRequestThreadEntryPoint:) object:nil];
        [_networkRequestThread start];
    });
    return _networkRequestThread;
}
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+ (void)networkRequestThreadEntryPoint:(id)__unused object {
    @autoreleasepool {
        [[NSThread currentThread] setName:@"AFNetworking"];
        NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
        [runLoop addPort:[NSMachPort port] forMode:NSDefaultRunLoopMode];
        [runLoop run];
    }
}
文章目录
  1. 1. associatedtype