相关疑难解决方法(0)

如何在Xcode 4中设置NSZombieEnabled和CFZombieLevel执行我的可执行文件？

我在发展UIButton.

UIButton当我推动时,我正试图运行UIButton.

但我不能按下按钮,因为UIButton阻止了UIButton.

是否存在UIButton,我可以运行UIButton在UIButton并推UIButton？

提前致谢.

我的所有代码都在AppDelegate.m中:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];

    _locationMgr = [[CLLocationManager alloc] init];
    [_locationMgr setDelegate:self];
    if([_locationMgr respondsToSelector:@selector(setAllowsBackgroundLocationUpdates:)])
        [_locationMgr setAllowsBackgroundLocationUpdates:YES];
    CLAuthorizationStatus authorizationStatus= [CLLocationManager authorizationStatus];

    if([launchOptions valueForKey:UIApplicationLaunchOptionsLocationKey] != nil) {
        NSLog(@"relaunching because of significant location change - restarting SLC");
        [_locationMgr startMonitoringSignificantLocationChanges];
    }
    else
    {
        if (authorizationStatus == kCLAuthorizationStatusAuthorizedAlways) {
            NSLog(@"launching with authorization to always use location - starting SLC");
            [_locationMgr startMonitoringSignificantLocationChanges];
        }
        else
        {
            NSLog(@"launching with no authorization to always use location - requesting authorization");
            if([_locationMgr respondsToSelector:@selector(requestAlwaysAuthorization)])
                [_locationMgr …

我需要在 UITableView 中实现某种延迟加载。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //... some initializations here

    //this is a function that pulls my cell data using helper class
    NSData *cellData=[MyDataClass dataForCellAtIndexPath:indexpath.row];

    //... here I populate pulled data to cell

    return cell;
}

一切都很好，但表视图滚动不顺畅，因为dataForCellAtIndexPath方法很慢。所以我需要通过调用此方法来实现将数据惰性填充到单元格中。我期望的结果是表格视图将平滑滚动，但单元格的内容将在绘制单元格后填充一点。请帮助我，该怎么办？