MJRefresh不停上拉加载的问题
下边这段代码就是出现不停上拉加载的代码，代码中注释掉了self.tableView.estimatedRowHeight=2.0f。
以下为.m文件
#import"HYBidConsumeRecordViewController.h"
#import"MJRefresh.h"
#import"HYTestModel.h"
#import"testCell.h"
staticNSString*TestCellIdentifier =@"testID";
@interfaceHYBidConsumeRecordViewController()
@property(nonatomic,strong)NSMutableArray*consumeRecordList;
@property(nonatomic,assign)NSIntegerrequestCurrentPage;
@property(nonatomic,strong)UITableView*tableView;
@property(nonatomic,copy)NSString*timestamp;
@end
@implementationHYBidConsumeRecordViewController
#pragma mark - Life Cycle
- (void)viewDidLoad
{
[superviewDidLoad];
self.title=@"消费记录";
self.view.backgroundColor=HYRGBCOLOR(246,247,249);
_consumeRecordList= [@[]mutableCopy];
[selfinitTableView];
}
- (void)viewWillAppear:(BOOL)animated
{
[superviewWillAppear:animated];
}
-(void)viewWillDisappear:(BOOL)animated
{
[superviewWillDisappear:animated];
}
#pragma mark - Assist
- (void)initTableView
{
self.tableView= [[UITableViewalloc]initWithFrame:self.view.framestyle:UITableViewStylePlain];
self.tableView.backgroundColor=HYRGBCOLOR(246,247,249);
self.tableView.showsVerticalScrollIndicator=YES;
self.tableView.separatorStyle=UITableViewCellSeparatorStyleNone;
self.tableView.delegate=self;
self.tableView.dataSource=self;
[selfaddRefresh];
[self.viewaddSubview:self.tableView];
//self.tableView.estimatedRowHeight=2.0f;
}
#pragma mark - UITableViewDelegate & UITableViewDataSource
- (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section
{
return_consumeRecordList.count;
}
- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
testCell*cell = [tableViewdequeueReusableCellWithIdentifier:TestCellIdentifier];
if(!cell)
{
cell = [[testCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:TestCellIdentifier];
}
HYTestModel*model =self.consumeRecordList[indexPath.row];
cell.titleLabel.text= model.title;
cell.Creattime.text= model.timeTitle;
cell.timeContent.text= model.time;
cell.Remark.text= model.contentTitle;
cell.RemarkContent.text= model.content;
cell.BusinessPrice.text= model.priceTitle;
cell.Price.text= model.price;
returncell;
}
- (void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
[tableViewdeselectRowAtIndexPath:indexPathanimated:YES];
}
#pragma mark - Request
- (void)requestConsumeRecordList
{
ZBNetRequestData*req = [[ZBNetRequestDataalloc]init];
[reqsetString:@"1"forKey:@"cityId"];
[reqsetString:@""forKey:@"areaId"];
[reqsetString:@""forKey:@"timestate"];
[reqsetString:_timestampforKey:@"timestamp"];
[ZBNetAPIClientGET:@"/appbatch/getBids"parameters:[reqtoDictionary]success:^(NSURLSessionDataTask*task,idresponseObject) {
NSArray*tmpArray = responseObject[@"result"][@"data"];
if(tmpArray && tmpArray.count!=0)
{
for(NSDictionary*dicintmpArray)
{
HYTestModel*testModel = [[HYTestModelalloc]initWithDictionary:dic];
[_consumeRecordListaddObject:testModel];
}
if([_timestampisEqualToString:@""])
{
[self.tableView.headerendRefreshing];
}
else
{
[self.tableView.footerendRefreshing];
}
}
else
{
}
_timestamp=responseObject[@"result"][@"timestamp"];
[self.tableViewreloadData];
}failure:^(NSURLSessionDataTask*task,NSError*error) {
NSLog(@"responseObject:%@",error);
}];
}
#pragma mark - Refresh & Load
- (void)addRefresh
{
MJRefreshNormalHeader*header = [MJRefreshNormalHeaderheaderWithRefreshingTarget:selfrefreshingAction:@selector(pullDownRefreshing)];
[headersetTitle:@"下拉刷新"forState:MJRefreshStateIdle];
[headersetTitle:@"松开刷新消费记录"forState:MJRefreshStatePulling];
[headersetTitle:@"正在刷新消费记录..."forState:MJRefreshStateRefreshing];
[headerbeginRefreshing];
self.tableView.header= header;
MJRefreshAutoNormalFooter*footer = [MJRefreshAutoNormalFooterfooterWithRefreshingTarget:selfrefreshingAction:@selector(loadMoreRefreshing)];
[footersetTitle:MJRefreshAutoFooterIdleTextforState:MJRefreshStateIdle];
[footersetTitle:@"正在加载更多记录..."forState:MJRefreshStateRefreshing];
[footersetTitle:@""forState:MJRefreshStateNoMoreData];
self.tableView.footer= footer;
}
- (void)pullDownRefreshing
{
[_consumeRecordListremoveAllObjects];
self.timestamp=@"";
[selfrequestConsumeRecordList];
}
- (void)loadMoreRefreshing
{
[selfrequestConsumeRecordList];
}
@end
把self.tableView.estimatedRowHeight=2.0f注释打开，
问题还存在，依旧不停进行上拉加载操作。
解决方法：把self.tableView.estimatedRowHeight=150.0f;150这个数值是你cell的平均高度，如果estimatedRowHeight设置非常小，MJRefresh的KVO会监听错误的contentoffset，造成不停进行上拉加载操作。
解决问题的过程：首先我反复的验证我代码逻辑，确保代码逻辑无误。之后我把重点代码打断点一行一行debug，因为毕竟眼睛验证过的逻辑容易出现漏洞，再确保没有循环调用上拉操作方法的情况下。我怀疑是工程中有其他类监听了contentoffset，于是看MJRefresh源码，KVO中监听了contentoffset contentsize refreshstate三个属性，监听方法打断点调试，发现每次调用上拉操作后，监听者又监听到contentoffset的变化，说明contentoffset还是处于变化当中，而estimatedRowHeight预估行高后算出一个contentoffset值，cell以实际大小布局后，contentoffset又会算出一个值，这样KVO就会监听到contentoffset的变化，就会去调用上拉操作的接口，加载出来的数据会去填充tableview，estimatedRowHeight会预估行高算出一个contentoffset，之后cell会已实际大小布局，contentoffset又会算出一个值，之后就循环开来。
