我正在运行一个后台线程以从 Web 服务获取数据。
要获取创建 URL 所需的设置,我使用此方法:
+(Settings *)getSettings
{
Settings *settings = [[Settings alloc] init];
NSString *path = [NSString stringWithFormat:@"Documents/Settings"];
NSString *settingsPath = [NSHomeDirectory() stringByAppendingPathComponent:path];
NSFileManager *fileMgr = [NSFileManager defaultManager];
if ([fileMgr fileExistsAtPath:settingsPath]) {
NSDictionary *settingsDictionary = [NSDictionary dictionaryWithContentsOfFile:settingsPath];
settings.username = [settingsDictionary objectForKey:@"username"];
settings.module = [settingsDictionary objectForKey:@"module"];
settings.websiteUrl = [settingsDictionary objectForKey:@"websiteUrl"];
}else
{
settings.username = @"";
settings.module = @"";
settings.websiteUrl = @"";
}
NSLog(@"Settings = u:%@ m:%@ w:%@",settings.username,settings.module,settings.websiteUrl);
return settings;
}
这在调试器中运行良好,但是当我在设备上运行它时,我在 NSLog 或任何尝试使用带有警告的数据的类上得到 BAD_EXCESS:
警告:尝试使用不在框架中的块创建 USE_BLOCK_IN_FRAME 变量。
如果我单步执行代码,这就是代码在设备上可以正常工作。
有任何想法吗?
编辑:回溯-
#0 0x37a97eda in objc_retain ()
#1 0x37aa4be4 in objc_retainAutoreleasedReturnValue ()
#2 0x0000f84a in +[SettingData getSettings] (self=0x175e4, _cmd=0x11af9) at /Users/Jono/Dropbox/Uni/iOS5/Feedback At Tees/Feedback At Tees/SettingData.m:49
#3 0x0000fa86 in -[DataManager init] (self=0x3509e0, _cmd=0x30fd9f96) at /Users/Jono/Dropbox/Uni/iOS5/Feedback At Tees/Feedback At Tees/DataManager.m:19
#4 0x00003b46 in __35-[MasterViewController viewDidLoad]_block_invoke_0 (.block_descriptor=0x185f40) at /Users/Jono/Dropbox/Uni/iOS5/Feedback At Tees/Feedback At Tees/MasterViewController.m:70
#5 0x30b08d54 in _dispatch_call_block_and_release ()
#6 0x30b0b896 in _dispatch_worker_thread2 ()
#7 0x37a0e1ce in _pthread_wqthread ()
#8 0x37a0e0a4 in start_wqthread ()
我尝试将以下内容添加到设置的 init 方法中,如果我单步执行它是可以的
-(id)init
{
if ((self=[super init]))
{
NSString *path = [NSString stringWithFormat:@"Documents/Settings"];
NSString *settingsPath = [NSHomeDirectory() stringByAppendingPathComponent:path];
NSFileManager *fileMgr = [NSFileManager defaultManager];
if ([fileMgr fileExistsAtPath:settingsPath])
{
NSDictionary *settingsDictionary = [NSDictionary dictionaryWithContentsOfFile:settingsPath];
self.username = [settingsDictionary objectForKey:@"username"];
self.module = [settingsDictionary objectForKey:@"module"];
self.websiteUrl = [settingsDictionary objectForKey:@"websiteUrl"];
NSLog(@"Settings = u:%@ m:%@ w:%@",self.username,self.module,self.websiteUrl);
}
else
{
self.username = @"";
self.module = @"";
self.websiteUrl = @"";
}
}
NSLog(@"Settings = u:%@ m:%@ w:%@",self.username,self.module,self.websiteUrl);
return self;
}
截图: http: //postimage.org/image/4vw6uq7pp/