Xcode Instruments Time Profiler分析结果

问题是一个UITextField在Cell中，结果通过block回调回UITableView，结果在iOS7上面就死在这一句，CPU使用率飙升到100%，这个是用time profiler分析结果，表示没看懂，求大神解答下。

[biddingCell changeTextFieldValue:^(NSInteger price, NSNumber *percentage) {
                    if (biddingCell.biddingType ==BiddingTypeRent) {
                        weakPropertyFollowAllAddEntity.RentPrice = price;
                        weakPropertyFollowAllAddEntity.RentPer = percentage;
                        weakPropModelEntity.rentPer = [NSString stringWithFormat:@"%@",percentage];
                        
                    }else{
                        weakPropertyFollowAllAddEntity.SalePrice = price;
                        weakPropertyFollowAllAddEntity.SalePer = percentage;
                        weakPropModelEntity.salePer = [NSString stringWithFormat:@"%@",percentage];
                    }
                    
                    [weakSelf.tableView reloadData];
                    
                }];
                
                
-(void)textFieldDidEndEditing:(UITextField *)textField{
    
    [self changeTextFieldContent];
    
    if (_block) {
        _block(textField.text.integerValue,_percentage);
    }
    
    [textField resignFirstResponder];
    
}

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目前没看出来，哪边有问题，可以从block循环引起的方面查查！