Loading xib crashes app

Question

Hello all I am having a issue with showing a xib file from the main file not sure why this is happening with some of the xib files and not others.

if(segment == @"1"){
    Results1 *myView1 = [[Results1 alloc]initWithNibName:@"Results1" bundle:nil];
    [self.view addSubview:myView1.view];
}else if(segment == @"2"){
    Results2 *myView2 = [[Results2 alloc]initWithNibName:@"Results2" bundle:nil];
    [self.view addSubview:myView2.view];
}else if(segment ==@"3"){
    Results3 *myView3 = [[Results3 alloc]initWithNibName:@"Results3" bundle:nil];
    [self.view addSubview:myView3.view];
}else if(segment ==@"4"){
    Results4 *myView4 = [[Results4 alloc]initWithNibName:@"Results4" bundle:nil];
    [self.view addSubview:myView4.view];
}

Is my code the first xib files opens but not the rest I am not sure why, I have added .h files:

#import "Results1.h"
#import "Results2.h"
#import "Results3.h"
#import "Results4.h"

the app ends up on this line when debugging:

@autoreleasepool {
    return UIApplicationMain(argc, argv, nil, NSStringFromClass([TestTypingToolAppDelegate class]));
}

and then it crashes, anyone have any idea?

what are the names of the `xib` files? what kind of objects are the _Results_? has the `view` been connected to the `view` property in each view controller? many, many things are not clear to find out the reason of the crash. — holex, Aug 10 '12 at 17:42
It may not help in this case but using `==` for string comparison is inherently wrong unless you're interested in the address of the objects. Switch to `isEqualToString:`. — Phillip Mills, Aug 10 '12 at 17:47
Not sure how to connect the view? But the first one works and they are all the same so I assumed they all should work, when I walk threw the code it does see what xib it should load it just does not load. — Tim, Aug 10 '12 at 17:54
@Tim, you should connect them manually. have you done it yet? — holex, Aug 10 '12 at 17:57

score 0 · Answer 1 · answered Aug 10 '12 at 17:54

You need to look at the console output when the application takes you to that line in your main.m. For me it was always a mistake on my part with the most common mistake being 1) The file does not exist (Results1.xib) or 2) I forgot to set the view outlet. As I mentioned the details from the exception in console output will help you.

score 0 · Accepted Answer · answered Aug 10 '12 at 18:00

0

Tim, here is a picture from the Interface Builder, maybe it helps you:

enter image description here

answered Aug 10 '12 at 18:00

holex

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you are welcome! have a nice weekend, don't work too hard. :) – holex Aug 10 '12 at 18:09

score 0 · Answer 3 · answered Aug 10 '12 at 19:43

Keep in mind that sometimes loading a view crashes on the device but not the simulator. In this situation, check to ensure that when you call:

 initWithNibName:@"YourNibName";

that the casing of your nib name string is exactly the same as the nib file. The simulator ignores cases, but the device requires an exact match (pretty irritating)

Loading xib crashes app

3 Answers3

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