iOS为同一个类型的对象执行同一个方法

主要用于一个数组的元素需要执行同样的方法.

//模型

#import "Animal.h"

@implementation Animal
- (void)setName:(NSString *)name
{
    _name = name;
}

- (void)printInfo:(NSString *)info
{
    NSLog(@"info = %@",info);
}

//常见的循环遍历

 NSMutableArray *array = [[NSMutableArray alloc]init];
        //for 循环
        for (int i = 0; i < 10; i++) {
            Animal *animal = [[Animal alloc]init];
            animal.name = @"monkey";
            [array addObject:animal];
        }
        
        //for in
        for (Animal *aniaml in array) {
            [aniaml printInfo:aniaml.name];
        }
    
        //迭代器
        NSEnumerator *enumerator = [array objectEnumerator];
        id object = nil;
        while (object = [enumerator nextObject]) {
            if ([object respondsToSelector:@selector(printInfo:)]) {
                [object printInfo:((Animal*)object).name];
            }
        }
        
        //block
        [array enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            if ([obj isKindOfClass:[Animal class]]) {
                if ([obj respondsToSelector:@selector(printInfo:)]) {
                    [obj printInfo:((Animal*)obj).name];
                }
            }
        }];

//NSArray  ->  makeObjectsPerformSelector

[array makeObjectsPerformSelector:@selector(printInfo:) withObject:@"name"];

//执行结果

 

记下笔记.