MJRefresh/MJRefresh/Base/MJRefreshFooter.m

//  代码地址: https://github.com/CoderMJLee/MJRefresh
//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
//  MJRefreshFooter.m
//  MJRefreshExample
//
//  Created by MJ Lee on 15/3/5.
//  Copyright (c) 2015年 小码哥. All rights reserved.
//

#import "MJRefreshFooter.h"

@interface MJRefreshFooter()

@end

@implementation MJRefreshFooter
#pragma mark - 构造方法
+ (instancetype)footerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock
{
    MJRefreshFooter *cmp = [[self alloc] init];
    cmp.refreshingBlock = refreshingBlock;
    return cmp;
}
+ (instancetype)footerWithRefreshingTarget:(id)target refreshingAction:(SEL)action
{
    MJRefreshFooter *cmp = [[self alloc] init];
    [cmp setRefreshingTarget:target refreshingAction:action];
    return cmp;
}

#pragma mark - 重写父类的方法
- (void)prepare
{
    [super prepare];
    
    // 设置自己的高度
    self.mj_h = MJRefreshFooterHeight;
    
    // 默认是自动隐藏
    self.automaticallyHidden = YES;
}

- (void)willMoveToSuperview:(UIView *)newSuperview
{
    [super willMoveToSuperview:newSuperview];
    
    if (newSuperview) {
        // 监听scrollView数据的变化
        [self.scrollView setReloadDataBlock:^(NSInteger totalDataCount) {
            if (self.isAutomaticallyHidden) {
                self.hidden = (self.scrollView.totalDataCount == 0);
            }
        }];
    }
}

#pragma mark - 公共方法
- (void)noticeNoMoreData
{
    self.state = MJRefreshStateNoMoreData;
}

- (void)resetNoMoreData
{
    self.state = MJRefreshStateIdle;
}
@end