使UIActivityIndi​​cator的尺寸与UIRefreshControl的尺寸相同

Question

我想让UIActivityIndi​​cator的尺寸与UIRefreshControl的尺寸相同，因为有时我需要手动刷新屏幕，有时候数据刷新时不需要拉动屏幕，所以我需要模拟活动指标。

_refreshControl = [[UIRefreshControl alloc] init]; 
    _refreshControl.tintColor = [UIColor grayColor]; 
    [_refreshControl addTarget:self action:@selector(refreshItems) forControlEvents:UIControlEventValueChanged]; 
    [self.collectionView addSubview:_refreshControl]; 


    UIView *activityIndicatorWrapper = [[UIView alloc] initWithFrame:_refreshControl.frame]; 

    [self.collectionView addSubview:activityIndicatorWrapper]; 

    _activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
    activityIndicatorWrapper.frame = _refreshControl.bounds; 

    [activityIndicatorWrapper addSubview:_activityIndicator]; 
    [_activityIndicator startAnimating]; 
    [_activityIndicator autoCenterInSuperview]; 
    _activityIndicator.hidesWhenStopped = YES; 

问题是，大小是不同的，即使我让他们在同一帧..

Answer 1

我试图做到这一点为好。我不认为这是可能的，因为我们无法看到UIKit在幕后做了什么。