UIViewController中的UIRefreshControl

Question

我有一個UIViewController，它有一個UITableView作爲subView。我正試圖在桌面上添加一個拉到刷新。 我有UIRefresh顯示，但它從來沒有調用選擇器。我沒有收到有關拉動行動的通知。 因爲我使用這個查看我的通用視圖我不能使用TableView控制器，這樣我可以使用多個視圖控制器

- (void)viewDidLoad{ 

    [super viewDidLoad]; 

    // Refresh control 
    UITableViewController *tableViewController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain]; 
tableViewController.tableView = self.genericMainTableView; 

// Initialise refresh control 
self.refreshControl = [[UIRefreshControl alloc] init]; 

//Adding target to refresh Control object 
[self.refreshControl addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventValueChanged]; 

//Setting attribute Title 
self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"Pull To Refresh"]; 

//Adding as subview to tableView 
tableViewController.refreshControl = self.refreshControl; 

} 

- (void)refresh:(UIRefreshControl *)refreshControl { 

reachability = [Reachability reachabilityForInternetConnection]; 
NetworkStatus netStatus = [reachability currentReachabilityStatus]; 
//Not Reachable - No Internet Connection 
if (netStatus == NotReachable) { 
    [[[UIAlertView alloc]initWithTitle:@"Network Error" message:@"Please Check your Network Connection" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]show]; 
    [refreshControl endRefreshing]; 

} 
else{ 

    //My Function Call 
    [self functionCall]; 

    //Reload the Table 
    [self.genericMainTableView reloadData]; 

    //set the title while refreshing 
    refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"Refreshing the TableView"]; 
    //set the date and time of refreshing 
    NSDateFormatter *formattedDate = [[NSDateFormatter alloc]init]; 
    [formattedDate setDateFormat:@"MMM d, h:mm a"]; 
    NSString *lastupdated = [NSString stringWithFormat:@"Last Updated on %@",[formattedDate stringFromDate:[NSDate date]]]; 
    refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:lastupdated]; 

    //End Refreshing 
    [refreshControl endRefreshing]; 
} 

}

上午我在這裏所做的一切。它不適合我。請幫助我。

Answer 1

你必須開始在你的viewDidLoad的UIRefreshControl這樣的：

// Pull To Refresh Code 
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init]; 
[refreshControl addTarget:self action:@selector(handleRefresh:) forControlEvents:UIControlEventValueChanged]; 

這是你的選擇handleRefresh:

-(void) handleRefresh:(UIRefreshControl *) refreshControl{ 
    [self performSelector:@selector(yourMethodHere)]; 
} 

還嘗試檢查，提及你的選擇是否工作。點擊你的選擇器，然後按住命令按鈕。

Answer 2

問題出在你的viewDidLoad上。無需實例化UITableViewController進行刷新控制。只是改變viewDidLoad到這

- (void)viewDidLoad{ 

[super viewDidLoad]; 

// Initialise refresh control 
self.refreshControl = [[UIRefreshControl alloc] init]; 

//Adding target to refresh Control object 
[self.refreshControl addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventValueChanged]; 
//Setting attribute Title 
self.refreshControl.attributedTitle = [[NSAttributedString alloc]initWithString:@"Pull To Refresh"]; 

//Adding as subview to tableView 
[self.genericMainTableView addSubview:self.refreshControl]; 

}