数组遍历

//
//  main.m
//  遍历
//
//  Created by syrcfwzx on 16/1/7.
//  Copyright (c) 2016年 syrcfwzx. All rights reserved.
//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
    
        NSArray* array = @[@"one",@"two",@"three"];
        //下标遍历
        for(int i=0;i<[array count];i++)
        {
            id obj = [array objectAtIndex:i];
            NSLog(@"%@",obj);
        }
        //for in语法
        for(id obj in array)
        {
            NSLog(@"%@",obj);
        }
        //枚举器
        NSString* str = nil;
        NSEnumerator* enumerator  = [array objectEnumerator];
        while (str = [enumerator nextObject])
        {
            NSLog(@"%@",str);
        }
        //block语法
        [array enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            NSLog(@"idx=%ld obj=%@",idx,obj);
        }];
    }
    return 0;
}