所以我有一个 Collection View ,它使用核心数据动态生成一组按钮。我已经完成了为按钮分配按钮和值的部分。
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
static NSString *identifier = @"Cell";
[self.collectionView registerNib:[UINib nibWithNibName:@"CollectionViewCell" bundle:nil] forCellWithReuseIdentifier:identifier];
CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
[cell.myButton addTarget:self
action:@selector(collectionViewButtonPressed:)
forControlEvents:UIControlEventTouchUpInside];
UIImage *btnImage;
btnImage = [UIImage imageNamed:[sportButtons objectAtIndex:indexPath.row]];
NSNumber *sportsValue;
sportsValue =[NSNumber numberWithInt:(int)[sportsNumber objectAtIndex:indexPath.row]];
[cell.myButton setBackgroundImage:btnImage forState:UIControlStateNormal];
return cell;
}
所以这工作正常
现在这是执行 Segue 的代码
- (void)collectionViewButtonPressed:(UIButton *)sender {
[self performSegueWithIdentifier:@"venues" sender:self];
}
现在这段代码在这里,我如何获取单元格/按钮中的 sportsValue 将其传递到下一个 View Controller ,以便我可以将其用作变量
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:@"venues"]) {
//so how do I get that sportsValue in the cell/button to pass it onto to the next view controller so I can use it as a variable
}
}
最佳答案
这是一个示例,说明如何在 collectionViewButtonPressed
中获取 sportsValue 并将其传递给 nextVC
-
在FirstViewController.m
类
中-
#import "YourNextVIewController.h"
@interface FirstViewController (){
NSNumber *passSportsValue; // this will hold your sports value when button pressed.
}
@end
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
static NSString *identifier = @"Cell";
[self.collectionView registerNib:[UINib nibWithNibName:@"CollectionViewCell" bundle:nil] forCellWithReuseIdentifier:identifier];
CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
[cell.myButton addTarget:self
action:@selector(collectionViewButtonPressed:)
forControlEvents:UIControlEventTouchUpInside];
UIImage *btnImage;
btnImage = [UIImage imageNamed:[sportButtons objectAtIndex:indexPath.row]];
NSInteger sportsValue;
sportsValue =[[sportsNumber objectAtIndex:indexPath.row]integerValue];
[cell.myButton setBackgroundImage:btnImage forState:UIControlStateNormal];
cell.myButton.tag= sportsValue; // or cell.myButton.tag=indexPath.row; No need to get sportsValue in this method
// you can also use cell.myButton.superview.tag property to pass your sportsValue, if you don't want to use myButton.tag property
return cell;
}
- (void)collectionViewButtonPressed:(UIButton *)sender {
passSportsValue = [NSNumber numberWithInteger:sender.tag]; // i.e. your sportsValue
/* if you are using indexPath.row i.e. cell.myButton.tag = indexPath.row;
passSportsValue = [NSNumber numberWithInteger:[[sportsNumber objectAtIndex:sender.tag]integerValue]];
*/
[self performSegueWithIdentifier:@"venue" sender:self];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:@"venue"]) {
YourNextVIewController *nextVC = [segue destinationViewController];
nextVC.passNumber = passSportsValue;
}
}
在YourNextVIewController.h类
中添加此行
@property (strong, nonatomic) NSNumber *passNumber;
现在您可以在YourNextVIewController.m
中检查passSportsValue
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"%d",[self.passNumber integerValue]);
}
希望这能解决您的问题..
关于ios - Objective C IOS prepareForSegue 如何获取分配给下一个 View Controller 按钮的 int 变量,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37740552/