Pass string from UITableView to UIView in iOS - iphone

Question

I want to pass 2 string selected from UITableview (CompleteView) to new UIView (DetailView)
This is my code:
In CompleteView.h()
#property (nonatomic, retain) NSString *memoString;
#property (nonatomic, retain) NSString *previewString;
In Completeview.m()
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
previewString = [PreviewArray objectAtIndex:indexPath.row];
NSLog(#"Preview string %#",previewString);
memoString = [MemoArray objectAtIndex:indexPath.row];
NSLog(#"Memo string %#",memoString);
DetailView *detailAlert = [[DetailView alloc] initWithFrame:CGRectMake(10, 40, 300, 300)];
detailAlert.strPreview =previewString ;
detailAlert.strMemo = memoString;
[self.view addSubview:detailAlert];
[detailAlert show];
[detailAlert release];
}
In DetailView()
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
originalFrame = frame;
UIWebView *videoview = [[UIWebView alloc] initWithFrame:CGRectMake(10,80,275.0,150)];
NSString *url=[NSURL URLWithString:strPreview];
NSURL *nsurl=[NSURL URLWithString:url];
NSURLRequest *nsrequest=[NSURLRequest requestWithURL:nsurl];
[videoview loadRequest:nsrequest];
[self addSubview:videoview];
return self;
}
In DetailView.h
#property (nonatomic, retain) NSString* strMemo;
#property (nonatomic, retain) NSString* strPreview;
When run, previewString not send to DetailView. I'm debug, when run strPreview and strMemo in DetailView is 0x00000. Thanks in advance

Answer 1

You can pass custom Initialisers like below . If you wish you can add one parameter
to custom Initialisers
In CompleteView.h()
#property (nonatomic, retain) NSString *memoString;
#property (nonatomic, retain) NSString *previewString;
In Completeview.m()
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
previewString = [PreviewArray objectAtIndex:indexPath.row];
NSLog(#"Preview string %#",previewString);
memoString = [MemoArray objectAtIndex:indexPath.row];
NSLog(#"Memo string %#",memoString);
DetailView *detailAlert = [[DetailView alloc] initWithFrame:CGRectMake(10, 40, 300, 300) andPreviewstring:previewString];
detailAlert.strPreview =previewString ;
detailAlert.strMemo = memoString;
[self.view addSubview:detailAlert];
[detailAlert show];
[detailAlert release];
}
In DetailView()
- (id)initWithFrame:(CGRect)frame andPreviewstring:(NSString *)stPreview
{
self = [super initWithFrame:frame];
if (self) {
originalFrame = frame;
UIWebView *videoview = [[UIWebView alloc] initWithFrame:CGRectMake(10,80,275.0,150)];
NSString *url=[NSURL URLWithString:strPreview];
NSURL *nsurl=[NSURL URLWithString:url];
NSURLRequest *nsrequest=[NSURLRequest requestWithURL:nsurl];
[videoview loadRequest:nsrequest];
[self addSubview:videoview];
return self;
}
In DetailView.h
#property (nonatomic, retain) NSString* strMemo;
#property (nonatomic, retain) NSString* strPreview;
- (id)initWithFrame:(CGRect)frame andPreviewstring:(NSString *)stPreview;

Answer 2

try this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
previewString = [PreviewArray objectAtIndex:indexPath.row];
NSLog(#"Preview string %#",previewString);
memoString = [MemoArray objectAtIndex:indexPath.row];
NSLog(#"Memo string %#",memoString);
DetailView *detailAlert = [[DetailView alloc] initWithFrame:CGRectMake(10, 40, 300, 300)];
detailAlert.strPreview =previewString ;
detailAlert.strMemo = memoString;
[detailAlert createWebView];
[self.view addSubview:detailAlert];
[detailAlert show];
[detailAlert release];
}
write code for string allocation
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
originalFrame = frame;
//add following two lines
strPreview = [[NSString alloc] init];
strMemo = [[NSString alloc] init];
//........
return self;
}
-(void) createWebView {
UIWebView *videoview = [[UIWebView alloc] initWithFrame:CGRectMake(10,80,275.0,150)];
NSString *url=[NSURL URLWithString:strPreview];
NSURL *nsurl=[NSURL URLWithString:url];
NSURLRequest *nsrequest=[NSURLRequest requestWithURL:nsurl];
[videoview loadRequest:nsrequest];
[self addSubview:videoview];
}

Answer 3

The problem here is you are setting two properties in detail view after initializing DetailView. But you are trying to use a property values within the initializer which are yet to be set.
As I can see there are two options you can try out.
Write another initializer which accept these two properties. So that you can use those two properties in that initializer.
(id)initWithFrame:(CGRect)frame strMemo:(NSString *)memo strPreview:(NSString *)preview {
self = [super initWithFrame:frame];
if (self) {
originalFrame = frame;
UIWebView *videoview = [[UIWebView alloc] initWithFrame:CGRectMake(10,80,275.0,150)];
NSString *url=[NSURL URLWithString:preview];
NSURL *nsurl=[NSURL URLWithString:url];
NSURLRequest *nsrequest=[NSURLRequest requestWithURL:nsurl];
[videoview loadRequest:nsrequest];
[self addSubview:videoview];
return self;
}
Or else you can extract the logic in the current initializer and put them in to a separate method which you can called after setting two properties from the CompleteView.