Ben Clayton created CB-754:
------------------------------
Summary: Use of -weak_library in 'other library flags' of
generated template XCode app causes crashes in Simulator when Obj-C Blocks are
used
Key: CB-754
URL: https://issues.apache.org/jira/browse/CB-754
Project: Apache Cordova
Issue Type: Bug
Components: iOS
Affects Versions: 1.7.0
Environment: XCode 4.3.2 & iOS Simulator 5.1
Reporter: Ben Clayton
Assignee: Shazron Abdullah
Create an Xcode project using the Cordova 1.7 Template.
Open the MainViewController.m file, and overwrite the viewDidLoad method with:
- (void) viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
[UIView animateWithDuration:0.75
animations:^{
self.view.alpha = 0.5;
self.view.alpha = 1.0;
}
completion:^(BOOL finished){
NSLog(@"Complete");
}];
}
Run app in the iPhone simulator.
App crashes with EXC_BAD_ACCESS (code=2 address 0x0) on line beginning [UIView
..
Solution:
Alter the build settings 'Other linker flags' for main target.
- Remove -weak_library
- Replace with -weak-lSystem
Re-build, app no longer crashes. Note that it works on the device regardless of
this setting.
Suggest template includes this change.
This stackoverflow post describes the problem in more detail:
http://stackoverflow.com/questions/6738858/use-of-blocks-crashes-app-in-iphone-simulator-4-3-xcode-4-2-and-4-0-2
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