【代码笔记】iOS-正在加载

一，效果图。

二，代码。

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    
    [self showFooter:YES];
}
-(void)showFooter:(BOOL)showFooter
{
    NSLog(@"上拉刷新:加载更多view");
    
    if(!loadMoreView)
    {
        loadMoreView=[[UIView alloc]init];
        
        //加载控件
        UIActivityIndicatorView *activeView=[[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
        
        [activeView setFrame:CGRectMake(110, 10, 30, 30)];
        [activeView setBackgroundColor:[UIColor clearColor]];
        [loadMoreView addSubview:activeView];
        [activeView startAnimating];
   
        
        //文本
        UILabel *loadLabel=[[UILabel alloc]initWithFrame:CGRectMake(140, 10, 150, 30)];
        [loadLabel setTextAlignment:NSTextAlignmentLeft];
        [loadLabel setText:@"正在加载"];
        [loadLabel setTextColor:[UIColor colorWithRed:150/255.00 green:150/255.00 blue:150/255.00 alpha:1.0]];
        [loadLabel setBackgroundColor:[UIColor clearColor]];
        [loadMoreView addSubview:loadLabel];
    }
    
    [loadMoreView setFrame:CGRectMake(0, 60, 320, 100)];
    [loadMoreView setBackgroundColor:[UIColor clearColor]];
    
    if(!loadMoreView.superview)
    {
        [self.view addSubview:loadMoreView];
    }
    if(showFooter)
    {
       [loadMoreView setAlpha:1];
    }
    else
    {
       [loadMoreView setAlpha:0];
    }
    
}