Question

我已经阅读了很多这样的帖子，但我做的一切似乎都没有用。我只是尝试使用委托方法删除UITableView中的所有行：

deleteRowsAtIndexPaths

以下是我正在使用的代码：

- (void) clearNonATITable {

    NSMutableArray* arrIndexPaths = [NSMutableArray array];

    if (self.arrNonATIResults.count > 0) {

        [self.accountTable beginUpdates];
        for(int i=0; i<self.arrNonATIResults.count; i++) {
            NSIndexPath* indexPath = [NSIndexPath indexPathForRow:i inSection:0];
            [self.accountTable deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationFade];
        }
        [self.accountTable endUpdates];


        [self.accountTable reloadData];
        [self.arrNonATIResults removeAllObjects];

    }

}

以下是我用来填充数据源的代码：

- (void) updateNonATITable {

    [self.arrNonATIResults removeAllObjects];

    //setting up some test data - DELETE WHEN SERVICES ARE UP
    NSDictionary* dictRow1 = [[NSDictionary alloc] initWithObjectsAndKeys:
                              [NSNumber numberWithBool:YES], @"Is Target",
                              @"Local Pharmaceutical", @"Company Name",
                              @"71234567", @"Company ID",
                              @"123 Anystreet", @"Address",
                              @"Small Town", @"City",
                              @"Small Cell", @"Cell 5",
                              @"Booyeah!", @"Comments",
                              nil];

    NSDictionary* dictRow2 = [[NSDictionary alloc] initWithObjectsAndKeys:
                              [NSNumber numberWithBool:NO], @"Is Target",
                              @"Big Pharmaceutical", @"Company Name",
                              @"78903456", @"Company ID",
                              @"123 Main Street", @"Address",
                              @"Big City", @"City",
                              @"Small Cell", @"Cell 5",
                              @"Brady Rules!", @"Comments",
                              nil];

    self.arrNonATIResults = (NSMutableArray*)[NSArray arrayWithObjects:dictRow1, dictRow2, nil];




    //reload table
    [self.accountTable reloadData];
    [self.accountTable scrollRectToVisible:CGRectMake(0, 0, self.accountTable.frame.size.width, 38.0f) animated:YES];

}

断言错误是：

Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-3318.93/UITableView.m:1582

Answer 1

问题是在删除表行并重新加载表后删除数组中的数据。

可靠的方法是首先删除数组中的数据，然后在- (void) clearNonATITable { NSInteger count = (NSInteger)self.arrNonATIResults.count; if (count > 0) { NSMutableArray *arrIndexPaths = [NSMutableArray array]; [self.accountTable beginUpdates]; [self.arrNonATIResults removeAllObjects]; for (NSInteger i = 0; i < count; i++) { [arrIndexPaths addObject:[NSIndexPath indexPathForRow:i inSection:0]]; } [self.accountTable deleteRowsAtIndexPaths:arrIndexPaths withRowAnimation:UITableViewRowAnimationFade]; [self.accountTable endUpdates]; // The line to reload the table might be not necessary as the animation updates the table // [self.accountTable reloadData]; } }块中删除表行

import tkinter as tk
from tkinter import messagebox

# post a message
def post_message():
    messagebox.showinfo("Sample Messgebox", "close this and look at button")

root = tk.Tk()
b = tk.Button(root, text="Press Me", command=post_message)
b.pack()
root.mainloop()

从UITableview删除行会引发断言错误

1 个答案: