来自editActionsForRowAtIndexPath的Segue [英] Segue from editActionsForRowAtIndexPath
问题描述
出于指导目的，我正在制作一个小型银行类应用程序.
I'm making a little banking type app, for instructional purposes.
所有事务都存储为Core Data实体，使用Magical Record助手方法进行获取和排序.事务显示在UITableView中，并由fetchedObjects数组提供.
All transactions are stored as Core Data entities, fetched and sorted using Magical Record helper methods. The transactions are displayed in a UITableView, fed by a fetchedObjects array.
我希望能够像这样使用editActionsForRowAtIndexPath:
I want to be able to use editActionsForRowAtIndexPath like so:
第一个动作锁定到另一个uiviewController，第二个和第三个动作锁定到UIPopoverPresentationController.第四个按钮删除交易.
The first action segues to another uiviewController, the second and third to a UIPopoverPresentationController. The fourth button deletes the transaction.
以下是创建按钮的代码:
Here's the code to create the buttons:
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
//Obviously, if this returns no, the edit option won't even populate
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
//Nothing gets called here if you invoke `tableView:editActionsForRowAtIndexPath:` according to Apple docs so just leave this method blank
}
-(NSArray *)myArray:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewRowAction *delete = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Delete" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
// Delete code here
}];
UITableViewRowAction *changeAmt = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Amt" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
// popover amount change code
}];
changeAmt.backgroundColor = [UIColor colorWithRed:0.022 green:0.541 blue:0.001 alpha:1.00];
UITableViewRowAction *changeAcct = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Acct" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
// popover account change code
}];
changeAcct.backgroundColor = [UIColor colorWithRed:1.000 green:0.492 blue:0.000 alpha:1.00];
UITableViewRowAction *viewTrans = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"View" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
{
// Push to view
}];
viewTrans.backgroundColor = [UIColor colorWithRed:0.002 green:0.342 blue:0.710 alpha:1.00];
return @[delete, changeAmt,changeAcct,viewTrans]; //array with the buttons delete, changeAmt, changeAcct, viewTrans
}
这是我的问题:
我如何知道哪个按钮触发哪个序列?我不知道如何建立连接.
How do I tell which button to trigger which segue? I can't figure how to make the connections.
这是我的prepareForSegue中具有代表性的代码块. ???表明了我的困惑.在sourceRect的参数中:
Here's a representative chunk of code from my prepareForSegue. One point of my confusion is indicated by the ??? in the argument for the sourceRect:
else if ([[segue identifier] isEqualToString:@"AmountPopSegue"])
{
UIViewController *controller = segue.destinationViewController;
controller.popoverPresentationController.delegate = self;
controller.preferredContentSize = CGSizeMake(320, 186);
UIPopoverPresentationController *thisPPC = controller.popoverPresentationController;
thisNavController = (UINavigationController *)segue.destinationViewController;
AmountChangePopVC *acVC = (AmountChangePopVC *)thisNavController.topViewController;
acVC.delegate = self;
thisPPC.sourceRect = ???;
}
感谢所有见解.我之所以写Objective C，是因为我在Swift风靡一时之前就开始了这个项目.
All insights appreciated. I'm writing in Objective C because I started this project before Swift became all the rage.
推荐答案
此方法可以为您提供帮助.您将知道轻按了哪个按钮.
This method can help you. You'll know which button was tapped.
-注意.此方法仅在iOS 8或更高版本中有效.-
--Be careful. this method only work in iOS 8 or later.--
@property (nonatomic, strong) NSIndexPath *firstButtonIndexPath;
@property (nonatomic, strong) NSIndexPath *secondButtonIndexPath;
@property (nonatomic, strong) NSIndexPath *thirdButtonIndexPath;
@property (nonatomic, strong) NSIndexPath *fourthButtonIndexPath;
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:@"showDetail"]) {
if (self.firstButtonIndexPath) {
NSLog(@"ViewButton :%ld", (long)self.firstButtonIndexPath.row);
} else if (self.secondButtonIndexPath) {
NSLog(@"Acct :%ld", (long)self.secondButtonIndexPath.row);
} else if (self.thirdButtonIndexPath) {
NSLog(@"Amt :%ld", (long)self.thirdButtonIndexPath.row);
} else if (self.fourthButtonIndexPath) {
NSLog(@"Delete :%ld", (long)self.fourthButtonIndexPath.row);
}
}
}
- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {
self.firstButtonIndexPath = nil;
self.secondButtonIndexPath = nil;
self.thirdButtonIndexPath = nil;
self.fourthButtonIndexPath = nil;
UITableViewRowAction *viewAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"View" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
NSLog(@"View the row");
self.firstButtonIndexPath = indexPath;
}];
viewAction.backgroundColor = [UIColor blueColor];
UITableViewRowAction *acctAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Acct" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
NSLog(@"Acct the row");
self.secondButtonIndexPath = indexPath;
}];
acctAction.backgroundColor = [UIColor orangeColor];
UITableViewRowAction *amtAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Amt" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
NSLog(@"Amt the row");
self.thirdButtonIndexPath = indexPath;
}];
amtAction.backgroundColor = [UIColor greenColor];
UITableViewRowAction *deleteAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Delete" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
NSLog(@"Delete the row");
self.fourthButtonIndexPath = indexPath;
}];
deleteAction.backgroundColor = [UIColor redColor];
return @[deleteAction, amtAction, acctAction, viewAction];
}
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