runtime那点事（3）动态获取类中的方法

+ (NSMutableArray *)getClassMethodWithClass:(Class)cls{
    
    //获得方法数组
    unsigned int count;
    
    Method * methodList = class_copyMethodList(cls, &count);
    
    NSMutableArray * methods = [[NSMutableArray alloc]initWithCapacity:0];
    
    //循环遍历获得方法名

    for (int i = 0; i<count; i++) {
        
        Method method = methodList[i];
        
        NSString * methodStr =  NSStringFromSelector(method_getName(method));
        
        [methods addObject:methodStr];
        
    }
    
    return methods;

}