这里只介绍UIRefreshControl的使用方法，虽然EGO已经用得挺舒服的了，但是官方给的。毕竟还是蛮简单的
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UIRefreshControl 具有一个默认的高度和宽度
一旦创建，便自动管理。只有当用户用力刷新才能刷新，尤其。。。那朵菊花，用力越大，转速越快，感觉还不错哦。(瞬间。。。邪恶了)
下面介绍一下如何使用:
self.refreshControl = [[UIRefreshControl alloc] init]; self.refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"刷新中"]; [self.refreshControl addTarget:self action:@selector(insertNewObject:) forControlEvents:UIControlEventValueChanged]; [self.tableView addSubview:self.refreshControl];
- (void)insertNewObject:(id)sender
{
self.numberOfnewPosts = [self getRandomNumberBetween:0 to:4];
NSLog(@"%d new fetched objects",self.numberOfnewPosts);
for(int i = 0; i < self.numberOfnewPosts; i++){
int addPost = [self getRandomNumberBetween:0 to:(int)([self.possibleTableData count]-1)];
[self.objects addObject:[self.possibleTableData objectAtIndex:addPost]];
}
[self.refreshControl endRefreshing];
[self.tableView reloadData];
}
-(int)getRandomNumberBetween:(int)from to:(int)to {
return (int)from + arc4random() % (to-from+1);
}