我想检查用户是否有打开的购物篮，如果没有的话，将其发送到菜单，然后将其发送到我的打开购物篮视图，但是我遇到了错误。
所以我的问题是如何摆脱这个问题？我的逻辑对吗？
'NSInvalidArgumentException', reason: '-[Merchant merchantId]: unrecognized selector sent to instance 0x7fad19529490'.
当我在菜单视图中按下按钮addToOrderButtonTapped时，我使用此方法检查是否有打开的购物篮
[[OrderManager sharedManager]getBasketsForMerchant:merchant success:^(NSArray *baskets) {
for (Basket *basket in baskets){
if ([basket.status isEqualToString:kBasketStatusOpen]) {
[self.openBaskets addObject:basket];
}
}if (self.openBaskets.count > 0){
self.openBaskets = self.openBaskets;
dispatch_async(dispatch_get_main_queue(), ^{
[self performSegueWithIdentifier:kSegueMenu sender:self];
});
}
else {
dispatch_async(dispatch_get_main_queue(), ^{
[self performSegueWithIdentifier:KSegueOpenBasket sender:self];
});
}
} failure:^(NSError *error, NSHTTPURLResponse *response) {
dispatch_async(dispatch_get_main_queue(), ^{
NSString *localizedString = NSLocalizedString(@"Order.ErrorLoadingOpenOrders", "Get error message");
[self showMessage:localizedString withTitle:MessageTypeError];
[MBProgressHUD hideAllHUDsForView:self.view animated:YES];
});
}];
菜单视图
//
// MenuItemViewController.m
// BaseApp
//
#import "MenuItemViewController.h"
#import "RoundedButton.h"
#import "MenuOptionCell.h"
#import "MenuItem.h"
#import "MenuOptionButton.h"
#import "MenuChoice.h"
#import "OrderManager.h"
#import "TypeOfChoiceCell.h"
#import "MenuOption.h"
#import "OrderPricingTableViewCell.h"
#import "RKManagedObjectStore.h"
#import "NSManagedObjectContext+RKAdditions.h"
#import "MerchantManager.h"
#import "Merchant.h"
#import "OrdersViewController.h"
#import "MenuItem.h"
#import "MenuViewController.h"
#import "OrderConfirmationViewController.h"
#import "OrderManager.h"
#import "APIClient.h"
#import "MenuManager.h"
#import "DiscoverViewController.h"
#import "DiscoverCollectionViewCell.h"
#import "MerchantManager.h"
#import "MenuViewController.h"
#import "MenuManager.h"
#import "MerchantDetailsViewController.h"
#import "OpenOrdersViewController.h"
typedef NS_ENUM(NSUInteger, MenuOptionsSection) {
MenuOptionsSectionRequired = 0,
MenuOptionsSectionOptional = 1
};
static NSString *const OpenBasketsSegue = @"OpenBaskets";
static NSString *const kSegueMenu = @"ShowMenu";
static NSString *const KSegueOpenBasket = @"OpenBaskets";
@interface MenuItemViewController () <UITableViewDelegate, UITableViewDataSource>
@property (nonatomic, weak) IBOutlet UILabel *menuItemName;
@property (nonatomic, weak) IBOutlet UILabel *quantityLabel;
@property (nonatomic, weak) IBOutlet UILabel *menuItemPrice;
@property (nonatomic, weak) IBOutlet UILabel *subTotalLabel;
@property (nonatomic, weak) IBOutlet UITextView *menuItemDescription;
@property (nonatomic, weak) IBOutlet RoundedButton *addToOrderButton;
@property (nonatomic, weak) IBOutlet UITableView *tableView;
@property (nonatomic, weak) IBOutlet UIView *cartView;
@property (nonatomic, weak) IBOutlet UIButton *subtractButton;
@property (nonatomic) NSDecimalNumber *temporarySubtotal;
@property (nonatomic, strong) NSMutableArray<MenuOption *> *requiredChoices;
@property (nonatomic, strong) NSMutableArray<MenuOption *> *optionalChoices;
@property (nonatomic, strong) NSMutableArray<NSMutableArray *> *optionChoicesSection;
@property (nonatomic, strong) NSMutableArray<NSDictionary *> *options;
@property (nonatomic, strong) NSMutableArray <Basket *>*openBaskets;
@property (nonatomic) BOOL launchViewFirstTime;
@end
@implementation MenuItemViewController
#pragma - Lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.title = @"Menu Item";
self.menuItemName.text = self.menuCategory.selectedBasketLine.menuItem.name;
self.menuItemPrice.text = [NSString stringWithFormat:@"%@", [Basket formattedCurrencyStringForAmount:self.menuCategory.selectedBasketLine.menuItem.price]];
self.quantityLabel.text = self.menuCategory.selectedBasketLine.quantity.stringValue;
self.temporarySubtotal = [self calculateTemporarySubtotal:[OrderManager sharedManager].currentBasket.subtotal menuItemPrice:self.menuCategory.selectedBasketLine.menuItem.price];
[self setSubtotalText:self.temporarySubtotal];
self.menuItemDescription.text = self.menuCategory.selectedBasketLine.menuItem.menuItemDescription;
self.subtractButton.alpha = 0.65;
self.requiredChoices = [[NSMutableArray alloc] init];
self.optionalChoices = [[NSMutableArray alloc] init];
self.optionChoicesSection = [[NSMutableArray alloc] init];
self.options = [[NSMutableArray alloc] init];
[self initializeChoiceArrays];
self.tableView.delegate = self;
self.tableView.dataSource = self;
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.launchViewFirstTime = YES;
if (self.optionChoicesSection.count > 0) {
[self.tableView reloadData];
} else {
self.tableView.hidden = YES;
}
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
self.launchViewFirstTime = NO;
}
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
for (MenuOption *menuOption in self.requiredChoices) {
[menuOption resetNumberOfChoicesSelected];
}
for (MenuOption *menuOption in self.optionalChoices) {
[menuOption resetNumberOfChoicesSelected];
}
self.menuCategory = nil;
}
- (void)viewDidLayoutSubviews {
[super viewDidLayoutSubviews];
[self.menuItemDescription setContentOffset:CGPointZero animated:YES];
}
#pragma - IBActions
- (IBAction)addButtonTapped:(id)sender {
NSInteger count = self.quantityLabel.text.integerValue;
count++;
if (count > 1) {
self.subtractButton.alpha = 1;
}
NSDecimalNumber *newSubTotal = [self.temporarySubtotal decimalNumberByAdding:self.menuCategory.selectedBasketLine.menuItem.price];
[self modifyCurrentBasketSubtotal:newSubTotal quantity:count];
}
- (IBAction)subtractButtonTapped:(id)sender {
NSInteger count = self.quantityLabel.text.integerValue;
if (count > 1) {
count--;
NSDecimalNumber *newSubTotal = [self.temporarySubtotal decimalNumberBySubtracting:self.menuCategory.selectedBasketLine.menuItem.price];
[self modifyCurrentBasketSubtotal:newSubTotal quantity:count];
if (count == 1) {
self.subtractButton.alpha = 0.65;
}
}
}
- (IBAction)addToOrderButtonTapped:(id)sender {
MenuOption *menuOption;
Merchant *merchant = [[Merchant alloc]init];
// First check if there are any missing required options that have to be selected
if ((menuOption = [self checkMissingRequiredOptionsHaveBeenSelected])) {
NSString *localizedString = NSLocalizedString(@"AddMenuItem.RequiredChoicesNotSelected", @"Get string for error");
NSString *formattedString = [NSString stringWithFormat:localizedString, menuOption.name];
[self showMessage:formattedString withTitle:MessageTypeError];
return;
}
// Now check if the minimum and maximum choice seletion have been met for the menu options
if ((menuOption = [self validateMinMaxForMenuOptionsHaveBeenMet])) {
NSString *localizedString = NSLocalizedString(@"AddMenuItem.MinMaxNotFulfilled", @"Get string for error");
NSString *formattedString = [NSString stringWithFormat:localizedString, menuOption.name];
[self showMessage:formattedString withTitle:MessageTypeError];
return;
}
// Add the menu item to the basket
if (self.menuItemAddedBlock) {
self.menuItemAddedBlock(self, self.menuCategory);
// [self dismissViewControllerAnimated:YES completion:nil];
//checking for open basket here
[[OrderManager sharedManager]getBasketsForMerchant:merchant success:^(NSArray *baskets) {
for (Basket *basket in baskets){
if ([basket.status isEqualToString:kBasketStatusOpen]) {
[self.openBaskets addObject:basket];
}
}if (self.openBaskets.count > 0){
self.openBaskets = self.openBaskets;
dispatch_async(dispatch_get_main_queue(), ^{
[self performSegueWithIdentifier:kSegueMenu sender:self];
});
}
else {
dispatch_async(dispatch_get_main_queue(), ^{
[self performSegueWithIdentifier:KSegueOpenBasket sender:self];
});
}
} failure:^(NSError *error, NSHTTPURLResponse *response) {
dispatch_async(dispatch_get_main_queue(), ^{
NSString *localizedString = NSLocalizedString(@"Order.ErrorLoadingOpenOrders", "Get error message");
[self showMessage:localizedString withTitle:MessageTypeError];
[MBProgressHUD hideAllHUDsForView:self.view animated:YES];
});
}];
}
}
- (IBAction)cancelButtonTapped:(UIBarButtonItem *)sender {
[self dismissViewControllerAnimated:YES completion:nil];
}
#pragma - UITableViewDelegate, UITableViewDataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return self.optionChoicesSection.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.optionChoicesSection[section].count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
MenuOptionCell *cell = (MenuOptionCell *)[tableView dequeueReusableCellWithIdentifier:[MenuOptionCell reuseIdentifier]];
cell.menuOption = self.optionChoicesSection[indexPath.section][indexPath.row];
cell.menuOptionCellButtonPressedBlock = ^(MenuOptionButton *button, MenuOption *option, MenuChoice *choice) {
[self adjustSelectedOptions:option choice:choice indexPath:indexPath];
};
cell.menuOptionCellDefaultOptionDetectedBlock = ^(MenuOptionButton *button, MenuOption *option, MenuChoice *choice) {
[self adjustSelectedOptions:option choice:choice indexPath:indexPath];
};
cell.menuOptionCellDeselectedBlock = ^(MenuOptionButton *button, MenuOption *option, MenuChoice *choice) {
[self adjustSelectedOptions:option choice:choice indexPath:indexPath];
};
[cell configureCell:self.launchViewFirstTime];
return cell;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
TypeOfChoiceCell *cell = (TypeOfChoiceCell *)[tableView dequeueReusableCellWithIdentifier:[TypeOfChoiceCell reuseIdentifier]];
switch ((MenuOptionsSection)section) {
case MenuOptionsSectionRequired:
if (self.requiredChoices.count > 0) {
cell.title = NSLocalizedString(@"AddMenuItem.RequiredChoiceText", @"Get string for title");
return cell;
} else if (self.optionalChoices.count > 0) {
cell.title = NSLocalizedString(@"AddMenuItem.OptionalChoiceText", @"get string for title");
return cell;
}
case MenuOptionsSectionOptional:
if (self.optionalChoices.count > 0) {
cell.title = NSLocalizedString(@"AddMenuItem.OptionalChoiceText", @"Get string for title");
return cell;
}
}
return nil;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
MenuOption *option = self.optionChoicesSection[indexPath.section][indexPath.row];
return [MenuOptionCell heightForMenuOption:option];
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return [TypeOfChoiceCell height];
}
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
return 0.01f;
}
#pragma - Helpers
- (void)setSubtotalText:(NSDecimalNumber *)subtotal {
if (!subtotal) {
self.subTotalLabel.text = NSLocalizedString(@"AddMenuItem.SubtotalDefault", @"Get string for subtotal");
} else {
NSString *localizedString = NSLocalizedString(@"AddMenuItem.SubtotalFormatted", @"Get string for subtotal");
self.subTotalLabel.text = [NSString stringWithFormat:localizedString, [Basket formattedCurrencyStringForAmount:subtotal]];
}
}
- (void)modifyCurrentBasketSubtotal:(NSDecimalNumber *)subtotal quantity:(NSInteger)quantity {
self.menuCategory.selectedBasketLine.quantity = [NSNumber numberWithInteger:quantity];
self.menuCategory.selectedBasketLine.subtotal = subtotal;
self.temporarySubtotal = subtotal;
[self setSubtotalText:subtotal];
self.quantityLabel.text = self.menuCategory.selectedBasketLine.quantity.stringValue;
}
- (NSDecimalNumber *)calculateTemporarySubtotal:(NSDecimalNumber *)orderManagerSubTotal menuItemPrice:(NSDecimalNumber *)menuItemPrice {
if (orderManagerSubTotal == 0) {
return menuItemPrice;
} else {
return [orderManagerSubTotal decimalNumberByAdding:menuItemPrice];
}
}
- (MenuOption *)checkMissingRequiredOptionsHaveBeenSelected {
for (MenuOption *menuOption in self.requiredChoices) {
if (!menuOption.selected) {
return menuOption;
}
}
return nil;
}
- (MenuOption *)validateMinMaxForMenuOptionsHaveBeenMet {
for (MenuOption *menuOption in self.requiredChoices) {
if ([menuOption validateIndividualMinMaxForMenuOption]) {
return menuOption;
}
}
for (MenuOption *menuOption in self.optionalChoices) {
if (menuOption.selected) {
if ([menuOption validateIndividualMinMaxForMenuOption]) {
return menuOption;
}
}
}
return nil;
}
- (void)initializeChoiceArrays {
NSArray<MenuOption *> *menuOptions = [self.menuCategory.selectedBasketLine.menuItem.menuOptions allObjects];
for (MenuOption *menuOption in menuOptions) {
if (menuOption.minimumChoices == nil) {
menuOption.minimumChoices = [NSNumber numberWithInt:0];
}
if (menuOption.maximumChoices == nil) {
menuOption.maximumChoices = [NSNumber numberWithInt:0];
}
// For now make an optional choice required if minimumChoices > 0
if (menuOption.isRequired || [menuOption.minimumChoices intValue] > 0) {
menuOption.isRequired = YES;
[self.requiredChoices addObject:menuOption];
} else {
[self.optionalChoices addObject:menuOption];
}
}
if (self.requiredChoices.count > 0) {
[self.optionChoicesSection addObject:self.requiredChoices];
}
if (self.optionalChoices.count > 0) {
[self.optionChoicesSection addObject:self.optionalChoices];
}
}
- (void)adjustSelectedOptions:(MenuOption *)option choice:(MenuChoice *)choice indexPath:(NSIndexPath *)indexPath {
self.menuCategory.selectedBasketLine.subtotal = self.menuCategory.selectedBasketLine.menuItem.price;
if (option.selected && option.menuChoices.count == 0) {
[self.options addObject:@{kOption: option.menuOptionId ?: @"", kChoice: @""}];
if (option.price) {
self.temporarySubtotal = [self.temporarySubtotal decimalNumberByAdding:option.price];
}
if (option.isRequired) {
self.requiredChoices[indexPath.row].selected = option.selected;
self.requiredChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
} else {
self.optionalChoices[indexPath.row].selected = option.selected;
self.optionalChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
}
} else {
if (option.menuChoices.count == 0) {
[self.options removeObject:@{kOption: option.menuOptionId ?: @"", kChoice: @""}];
if (option.price) {
self.temporarySubtotal = [self.temporarySubtotal decimalNumberBySubtracting:option.price];
}
if (option.isRequired) {
self.requiredChoices[indexPath.row].selected = option.selected;
self.requiredChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
} else {
self.optionalChoices[indexPath.row].selected = option.selected;
self.optionalChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
}
}
}
if (choice.selected && option.menuChoices.count > 0) {
[self.options addObject:@{kOption: choice.menuOption.menuOptionId ?: @"", kChoice: choice.menuChoiceId ?: @""}];
if (choice.price) {
self.temporarySubtotal = [self.temporarySubtotal decimalNumberByAdding:choice.price];
}
if (option.isRequired) {
self.requiredChoices[indexPath.row].selected = choice.selected;
self.requiredChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
} else {
self.optionalChoices[indexPath.row].selected = choice.selected;
self.optionalChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
}
} else {
if (option.menuChoices.count > 0) {
[self.options removeObject:@{kOption: choice.menuOption.menuOptionId ?: @"", kChoice: choice.menuChoiceId ?: @""}];
if (choice.price) {
self.temporarySubtotal = [self.temporarySubtotal decimalNumberBySubtracting:choice.price];
}
if (option.isRequired) {
if ([option.numberOfChoicesSelected intValue] == 0) {
self.requiredChoices[indexPath.row].selected = option.selected;
} else {
self.requiredChoices[indexPath.row].selected = !choice.selected;
}
self.requiredChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
} else {
self.optionalChoices[indexPath.row].selected = choice.selected;
self.optionalChoices[indexPath.row].numberOfChoicesSelected = option.numberOfChoicesSelected;
}
}
}
[self setSubtotalText:self.temporarySubtotal];
self.menuCategory.selectedBasketLine.attributes = self.options;
}
@end
这是给我错误的代码行
+ (void)getBasketsForMerchant:(Merchant *)merchant success:(void (^)(NSArray *basket))success failure:(void (^)(NSError *, NSHTTPURLResponse *))failure {
NSMutableDictionary* params = @{@"expand": @"merchant"}.mutableCopy;
if (merchant) {
params[@"merchant"] = merchant.merchantId;
}
[[RKObjectManager sharedManager] getObjectsAtPath:kOrdersEndpoint parameters:params success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult){
NSArray* items = mappingResult.array;
if (success) {
success(items);
}
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
if (failure) {
failure(error, operation.HTTPRequestOperation.response);
} else {
_defaultFailureBlock(operation, error);
}
}];
}
最佳答案
这个错误:
'NSInvalidArgumentException', reason: '-[Merchant merchantId]: unrecognized selector sent to instance 0x7fad19529490'.
表示您在
0x7fad19529490位置有一个对象，并尝试在其上调用“merchantId”。该对象不响应merchantId。因此，请非常仔细地查看商家的定义。您是否在
merchantId中正确掌握了fieldMappings的拼写？它是带有大写D的merchantID吗？如果您确定商家确切具有一个名为
merchantId的属性，那么下一个可能的事情是0x7fad19529490上的对象不是商家。最简单的方法是在断点导航器的底部添加一个异常断点(使用+)。发生此异常时，从错误中获取指针地址(每次可能不同)，然后在调试器中查看其内容。为此，在(lldb)提示符下，键入:
po (NSObject*)(0x7fad19529490)
但是请使用错误中的地址。如果是商人，我希望它说出类似以下内容:
<Merchant: 0x7fad19529490>
或者，如果您重写了
description，它将作为该输出。关于ios - 如何调试“发送到实例的无法识别的选择器”，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37928924/