我的comsci课程正在开发一个应用程序，它将根据日期和楼层显示我们学校的地图。我们无法让segue从SecondTableViewController转到MapViewController，因为我们认为背景图像（地图）没有正确设置。
SecondViewController.h
#import <UIKit/UIKit.h>
@interface SecondTableViewController : UITableViewController
@property(nonatomic, strong) NSString *daysName;
@property(nonatomic, strong) NSString *floorName;
@end
SecondViewController.m
#import "SecondTableViewController.h"
#import "MapViewController.h"
@interface SecondTableViewController ()
@end
@implementation SecondTableViewController {
NSArray *ADay;
NSArray *BDay;
NSArray *CDay;
NSArray *DDay;
NSArray *EDay;
NSArray *FDay;
NSArray *GDay;
NSArray *HDay;
}
/*-(void)configureWithImage:(UIImage *)paramImage
{
self.capturedImage = paramImage;
}*/
-(id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self)
{
//custom initalization
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
ADay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
BDay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
CDay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
DDay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
EDay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
FDay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
GDay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
HDay = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
//self.backImageView.image = self.capturedImage;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if ([_daysName isEqualToString:@"ADay"])
{
return [ADay count];
}
else if ([_daysName isEqualToString:@"BDay"])
{
return [BDay count];
}
else if ([_daysName isEqualToString:@"CDay"])
{
return [CDay count];
}
else if ([_daysName isEqualToString:@"DDay"])
{
return [DDay count];
}
else if ([_daysName isEqualToString:@"EDay"])
{
return [EDay count];
}
else if ([_daysName isEqualToString:@"FDay"])
{
return [FDay count];
}
else if ([_daysName isEqualToString:@"GDay"])
{
return [GDay count];
}
else if ([_daysName isEqualToString:@"HDay"])
{
return [HDay count];
}
return 0;
}
- (UIImage *)cellBackgroundForRowAtIndexPath:(NSIndexPath *)indexPath //:(NSString *)floorName
{
// NSInteger rowCount = [self tableView:[self tableView] numberOfRowsInSection:0];
NSInteger rowIndex = indexPath.row;
UIImage *background = nil;
return background;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"Floors2Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
if ([_daysName isEqualToString:@"ADay"]) {
cell.textLabel.text = [ADay objectAtIndex:indexPath.row];
}
else if ([_daysName isEqualToString:@"BDay"]) {
cell.textLabel.text = [BDay objectAtIndex:indexPath.row];
}
else if ([_daysName isEqualToString:@"CDay"]) {
cell.textLabel.text = [CDay objectAtIndex:indexPath.row];
}
else if ([_daysName isEqualToString:@"DDay"]) {
cell.textLabel.text = [DDay objectAtIndex:indexPath.row];
}
else if ([_daysName isEqualToString:@"EDay"]) {
cell.textLabel.text = [EDay objectAtIndex:indexPath.row];
}
else if ([_daysName isEqualToString:@"FDay"]) {
cell.textLabel.text = [FDay objectAtIndex:indexPath.row];
}
else if ([_daysName isEqualToString:@"GDay"]) {
cell.textLabel.text = [GDay objectAtIndex:indexPath.row];
}
else if ([_daysName isEqualToString:@"HDay"]) {
cell.textLabel.text = [HDay objectAtIndex:indexPath.row];
}
// Assign our own background image for the cell
UIImage *background = [self cellBackgroundForRowAtIndexPath:indexPath];
UIImageView *cellBackgroundView = [[UIImageView alloc] initWithImage:background];
cellBackgroundView.image = background;
cell.backgroundView = cellBackgroundView;
return cell;
}
#pragma mark - Navigation
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([[segue identifier] isEqualToString:@"showFloorDetail"]) {
NSArray *array = [NSArray arrayWithObjects: @"1stFloor",@"2ndFloor", @"3rdFloor", nil];
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
MapViewController *destViewController = segue.destinationViewController;
UIImage *Background;
if ([_daysName isEqual:@"ADay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"A2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"A3 copy.png"];
}
//background = [UIImage imageNamed:@"1stFloor"];
}
else if ([_daysName isEqual:@"BDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"B2 copy.png"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"B3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"CDay" ]){
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"C2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"C3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"DDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"D2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"D3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"EDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"E2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"E3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"FDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"F2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"F3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"GDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"G2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"G3 copy.JPEG"];
}
}
else {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"H2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"H3 copy.JPEG"];
}
}
[destViewController configureWithImage:Background];
destViewController.floorName = [array objectAtIndex:indexPath.row];
self.floorName = [array objectAtIndex:indexPath.row];
destViewController.title = destViewController.floorName;
}
}
@end
然后它导致MapViewController，这是一个UIImageView
MapViewController.h
#import <UIKit/UIKit.h>
//#import "SecondTableViewController.m"
@interface MapViewController : UIViewController
@property(nonatomic, strong)NSString *floorName;
@property(nonatomic, strong)NSString *daysName;
@property (nonatomic, strong) UIImage *background;
@end
MapViewController.m
#import "MapViewController.h"
#import "SecondTableViewController.h"
@interface MapViewController ()
-(void)configureWithImage:(UIImage *)paramImage;
@end
@implementation MapViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.daysName = _daysName;
// Assign our own background image for the cell
UIImage *Background;
if ([_daysName isEqual:@"ADay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"A2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"A3 copy.png"];
}
//background = [UIImage imageNamed:@"1stFloor"];
}
else if ([_daysName isEqual:@"BDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"B2 copy.png"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"B3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"CDay" ]){
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"C2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"C3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"DDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"D2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"D3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"EDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"E2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"E3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"FDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"F2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"F3 copy.JPEG"];
}
}
else if ([_daysName isEqual:@"GDay" ]) {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"G2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"G3 copy.JPEG"];
}
}
else {
if ([_floorName isEqual: @"2ndFloor"]) {
Background = [UIImage imageNamed:@"H2 copy.JPEG"];
}
if ([_floorName isEqual: @"3rdFloor"]) {
Background = [UIImage imageNamed:@"H3 copy.JPEG"];
}
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
我们不知道为什么segue不起作用以及为什么我们无法弄清楚如何设置MapViewController的背景。
先谢谢你的帮助!!
答案 0 :(得分：0)
您需要将方法声明移动到“MapViewController.h”，以便可以从第一个viewController访问它。 ：
//MapViewController.h
@interface MapViewController : UIViewController
-(void)configureWithImage:(UIImage *)paramImage;
@end
其次，你应该在原始视图控制器中调用segue：
[self performSegueWithIdentifier:@"showFloorDetail" sender:self];
另外，正如评论中所提到的，MapViewController.m中没有实现configureWithImage方法
-(void)configureWithImage:(UIImage *)paramImage {
// Process your image here
[yourImageView setImage:paramImage];
}
更多评论：MapViewController不是UIImageView。在代码中设置它的方式，你是UIViewController的子类。另外，请命名以小写字母开头的变量（根据Apple惯例）。只应使用大写的第一个字母命名类。