__weak LazyTableAppDelegate *weakSelf =self;
self.parser.errorHandler= ^(NSError*parseError) {
dispatch_async(dispatch_get_main_queue(), ^{
[UIApplicationsharedApplication].networkActivityIndicatorVisible=NO;//是否显示网络请求转圈
[weakSelfhandleError:parseError];
});
};
// referencing parser from within its completionBlock would create a retain cycle
__weak ParseOperation *weakParser =self.parser;
