ios - tableview segue 到另一个 View Controller
<p><p>我是编程新手,可能被一个简单的问题挂断了。我在我的表格 View 中为我的数组使用解析。选择该行后,我想转到另一个 ViewController 上的搜索栏。 segue 工作正常,tableview 工作正常,但我似乎无法让 objectId 通过。 </p>
<pre><code>#import "bookmarkViewController.h"
#import "Parse/Parse.h"
#import <ParseUI/ParseUI.h>
#import "ViewController.h"
@implementation bookmarkViewController
@synthesize postArray;
#pragma mark - View lifecycle
- (void)viewDidLoad
{
;
initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self
action:@selector(refreshButtonHandler:)]];
}
- (void)viewWillAppear:(BOOL)animated
{
if ()
;
}
#pragma mark - Button handlers
- (void)refreshButtonHandler:(id)sender
{
//Create query for all Post object by the current user
PFQuery *postQuery = ;
];
// Run the query
[postQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
//Save results and update the table
postArray = objects;
;
}
}];
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
(NSInteger)section
{
// Return the number of rows in the section.
return postArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:
(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [ initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
// Configure the cell with the textContent of the Post as the cell's text label
PFObject *post = ;
];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
*)indexPath{
NSLog(@"cell tapped");
PFObject *post = ;
NSLog(@"%@", post.objectId);
;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
ViewController *vc = ;
vc.labelText = post.objectId;
}
}
@end
</code></pre>
<p>在 vc.label.text 中,我总是使用未声明的标识符“post”,但我似乎不知道如何识别它。就是在上面的方法中。</p>
<p>NSLogs 正确回复 16:17:27.513 单元被点击
[应用] cgdVY7Eu9h</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>将您的 didSelectRowAtIndexPath 和 prepareForSegue 更改为:</p>
<pre><code>- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath* )indexPath{
;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSIndexPath *indexPath = ;
NSLog(@"cell tapped");
PFObject *post = ;
NSLog(@"%@", post.objectId);
ViewController *vc = ;
vc.labelText = post.objectId;
}
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - tableview segue 到另一个 ViewController ,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/27238999/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/27238999/
</a>
</p>
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