方法 | 問題或行為 |
-(BOOL) isKindOfClass : class-object | 對象是不是class-object或其子類的成員 |
-(BOOL) isMemberOfClass:class-object | 對象是不是class-object的成員 |
-(BOOL) respondsToSelector:Selector | 對象是否能夠響應selector所指定的方法 |
-(BOOL) instancesRespondToSelector | 指定的類實例是否能響應selector |
-(BOOL) isSubclassOfClass:class-object | 對象是否是指定類的子類 |
-(id) performSelector:selector | 應用selector指定的方法 |
-(id) performSelector:selector withObject:object | 應用selector指定的方法 |
-(id) performSelector:selector withObject:object1 withObject : object2 | 應用selector指定的方法 |
測試實驗設計
繼承關(guān)系圖:
Rectangle.h
Square.h
在main.h中的測試如下:
// // main.m // Square // // Created by Apple on 2017/9/9. // Copyright 2017年 Apple. All rights reserved. // #import <Foundation/Foundation.h> #import "Square.h" int main(int argc, const char * argv[]) { @autoreleasepool { Square *mySquare = [[Square alloc] init]; //isMemberof if( [mySquare isMemberOfClass:[Square class]] == YES ) { NSLog(@" mySquare is a member of Square class ");// } if( [mySquare isMemberOfClass:[Rectangle class]] == YES ) { NSLog(@"mySquare is s member of Rectamgle class"); } if([mySquare isMemberOfClass:[NSObject class]] == YES) { NSLog(@"mySquare is a member of NSObject class"); } //isKindOf if( [mySquare isKindOfClass:[Square class]] == YES ) { NSLog(@" mySquare is a kind of Square class ");// } if( [mySquare isKindOfClass:[Rectangle class]] == YES ) { NSLog(@"mySquare is s kind of Rectamgle class"); } if([mySquare isKindOfClass:[NSObject class]] == YES) { NSLog(@"mySquare is a kind of NSObject class");// } //respondsTo: if( [mySquare respondsToSelector:@selector(setSide:)] == YES ) { NSLog(@" mySquare responds to setSide : method "); } if( [mySquare respondsToSelector:@selector(setWidth:addHeight:)] == YES ) { NSLog(@"mySquare responds to setWidth:addHeight : method"); } if([Square respondsToSelector:@selector(alloc)] == YES) { NSLog(@"Square class responds to alloc method"); } //instancesRespondTo: if( [Rectangle instancesRespondToSelector:@selector(setSide:)] == YES ) { NSLog(@"Instances of respond to setSide : method"); } if( [Square instancesRespondToSelector:@selector(setWidth:addHeight:)] == YES ) { NSLog(@"Instances of Square respond to setWidth:addHeight: : method"); } if([Square isSubclassOfClass:[Rectangle class]] == YES) { NSLog(@"Square is a subclass of a rectangle"); } return 0; } }
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本文標題:Objective-C處理動態(tài)類型的方法-創(chuàng)新互聯(lián)
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