WebNSObject.PerformSelector Method (Foundation) Microsoft Learn Sign in .NET Languages Workloads APIs Resources Download .NET Version Xamarin.Mac SDK for macOS … WebperformSelector响应Objective-C动态性,将方法的绑定延迟到运行时,因此编译阶段不会检测方法有效性,即方法不存在也不会提示报错。反之因为此特性,performSelector也广 …
performSelector: Apple Developer Documentation
WebiOS: performSelectorOnMainThread (译) - (void)performSelectorOnMainThread: (SEL)aSelector withObject: (id)arg waitUntilDone: (BOOL)wait. … Web18 mei 2014 · 5 Answers. Sorted by: 194. Basically performSelector allows you to dynamically determine which selector to call a selector on the given object. In other words the selector need not be determined before runtime. Thus even though these are equivalent: [anObject aMethod]; [anObject performSelector:@selector (aMethod)]; immonot 14 achat maison
消息处理之performSelector - 简书
Web7 sep. 2024 · – (void)performSelectorOnMainThread: (SEL)aSelector withObject: (nullable id)arg waitUntilDone: (BOOL)wait; 这两个方法,在主线程和子线程中均可执行,均会调用主线程的aSelector方法 如果设置wait为YES:等待当前线程执行完以后,主线程才会执行aSelector方法; 设置为NO:不等待当前线程执行完,就在主线程上执行aSelector方法 … Web23 jan. 2024 · performSelector: withObject:是在iOS中的一种方法调用方式。. 向一个对象传递任何消息,而不需要在编译的时候声明这些方法。. 是runtime的一种应用方式。. 使 … Web14 feb. 2024 · `performSelector:`常用于调用运行时添加的方法,即编译时不存在,但是运行时候存在的方法。 另外需要注意的是`performSelector:`系统提供最多接受两个参数的方法,而且参数和返回都是`id`类型,并不支持基础数据类型(如:int, float等)。 3.3 使用IMP指针调用 创建`SEL`对象两种方法: 使用`@selector ()`创建 使用`NSSelectorFromString … list of triumph motorcycles