1
+ (AFTwitterAPIClient *)sharedClient {
static AFTwitterAPIClient *_sharedClient = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_sharedClient = [[AFTwitterAPIClientalloc] initWithBaseURL:[NSURLURLWithString:kAFTwitterAPIBaseURLString]];
});
return _sharedClient;
}
2
static PPSystemHelper *_sharedInstance = nil;
+ (PPSystemHelper *)sharedInstance
{
@synchronized(self) {
if (_sharedInstance == nil) {
_sharedInstance = [[self alloc] init];
}
}
return_sharedInstance;
}
- (id)init
{
if (self = [super init])
{
NSUserDefaults *defaults = [NSUserDefaultsstandardUserDefaults];
NSData *udObject = [defaults objectForKey:kUserDefault_TaskArray];
self.taskArray = [NSKeyedUnarchiver unarchiveObjectWithData:udObject] ;
if (_taskArray == nil) {
_taskArray = [[NSMutableArray alloc] init];
}
}
returnself;
}
+ (id)allocWithZone:(NSZone *)zone
{
@synchronized(self) {
if (_sharedInstance == nil) {
_sharedInstance = [super allocWithZone:zone];
return_sharedInstance;
}
}
returnnil;
}
- (id)copyWithZone:(NSZone *)zone
{
returnself;
}