Question

我对目标c，xcode和ios开发一般都很陌生。我只是想创建一个简单的TODO应用程序，但我没有运气我的支票完成。每次我点击一个项目，我在控制台日志中得到一个（lldb）和一个线程1：断点1.1我不知道它指的是什么。我的断点出现在最后一行[tableView deselectRowAtIndexPath:indexPath animated:YES];我不知道这里发生了什么。任何帮助将不胜感激。

#import "TDOViewController.h"

@interface TDOViewController () <UIAlertViewDelegate>

@property (nonatomic) NSMutableArray *items;

@end

@implementation TDOViewController

- (void)viewDidLoad {
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

    // Handles list of items
    self.items =  @[@{@"name" : @"Take out the trash", @"category" : @"home"}, @{@"name" : @"Shoes", @"category" : @"home"}].mutableCopy;

    // Handles navigation bar
    self.navigationItem.title = @"To-Do List";

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addNewItem:)];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

#pragma mark - Adding Items
- (void)addNewItem:(UIBarButtonItem *) sender {
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"New ToDo Item" message:@"Enter name of new ToDo Item" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Add Item", nil];
    alertView.alertViewStyle = UIAlertViewStylePlainTextInput;
    [alertView show];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex != alertView.cancelButtonIndex) {
        UITextField * itemNameField = [alertView textFieldAtIndex:0];
        NSString *itemName = itemNameField.text;
        NSDictionary *item = @{@"name" : itemName, @"category" : @"home"};
        [self.items addObject:item];
        [self.tableView insertRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:self.items.count - 1 inSection:0]] withRowAnimation:UITableViewRowAnimationAutomatic];
    }
}

#pragma mark - Table view datasource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.items.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"TodoItemRow";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    NSDictionary *item = self.items[indexPath.row];

    cell.textLabel.text = item[@"name"];

    if ([item[@"completed"] boolValue]) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    } else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    }

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSMutableDictionary *item = [self.items[indexPath.row] mutableCopy];
    BOOL completed = [item[@"completed"] boolValue];
    item[@"completed"] = @(!completed);

    self.items[indexPath.row] = item;

    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    cell.accessoryType = ([item[@"completed"] boolValue]) ? UITableViewCellAccessoryCheckmark : UITableViewCellAccessoryNone;
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}


@end

Answer 1

您可以删除断点导航器中的断点。如果您想调试代码，请按照“https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/debugging_with_xcode/chapters/debugging_tools.html”

链接进行操作

希望它有所帮助。

ios objective c todo app

1 个答案: