滾動AQGridView項目時出現滯後現象

Question

我在GridView（12行）中有45個項目的AQGridView視圖，當我滾動視圖時，會發生問題，當創建新行時，網格會變得遲緩。我正在考慮一次創建整行並從緩存或其他東西中使用它，而不是每次滾動時都要求創建它，因爲它不可用，並且在它滯後時看起來不太好。由於

- (AQGridViewCell *) gridView: (AQGridView *) aGridView cellForItemAtIndex: (NSUInteger) `enter code here`index 
{ 
    NSString *fullThumbPath = [itemsList objectAtIndex:index]; 
    int startOfThumbWord = [fullThumbPath rangeOfString:@"bundle"].location; 
    NSString *shortThumbPath = [fullThumbPath substringFromIndex:startOfThumbWord+7]; 
    if (
     ([vieta isEqualToString:@"cover"] || [vieta isEqualToString:@""]) && [labelis isEqualToString:@""]) { 
     static NSString * PlainCellIdentifier = @"ImageCell"; 
     AFInstallerImageCell2 * plainCell2 = (AFInstallerImageCell2 *)[aGridView dequeueReusableCellWithIdentifier: PlainCellIdentifier]; 
      plainCell2 = [[AFInstallerImageCell2 alloc] initWithFrame: CGRectMake(0.0, 0.0, 200.0, 150.0) // 330 
                reuseIdentifier: PlainCellIdentifier]; 

    plainCell2.selectionStyle = AQGridViewCellSelectionStyleNone; 
    plainCell2.path = [target stringByAppendingPathComponent:shortThumbPath];//[itemsList objectAtIndex:index]; 
    plainCell2.image = [UIImage imageWithContentsOfFile:[itemsList objectAtIndex:index]]; 
    plainCell2.layer.shouldRasterize = YES; 
    NSString *shortThumbPath = [fullThumbPath substringFromIndex:startOfThumbWord+30]; 

    shortThumbPath = [shortThumbPath stringByReplacingOccurrencesOfString:@"/Thumb.png" 
             withString:@""]; 

    NSString *title = [[shortThumbPath lastPathComponent] stringByDeletingPathExtension]; 
    plainCell2.title = [title stringByReplacingOccurrencesOfString:@"_" withString:@" "]; 
    return (plainCell2); 
} 

Answer 1

這是因爲你再次創造純plainCell2，再次

使用dequeueReusableCellWithIdentifier了的tableView/GridView控件，您可以 大大加快速度。取而代之的實例很多細胞的，你 只是實例儘可能多的需要，即作爲許多是可見的 （這是自動處理的），但要創建一個新的每個 時間

替換此

AFInstallerImageCell2 * plainCell2 = (AFInstallerImageCell2 *)[aGridView dequeueReusableCellWithIdentifier: PlainCellIdentifier]; 
      plainCell2 = [[AFInstallerImageCell2 alloc] initWithFrame: CGRectMake(0.0, 0.0, 200.0, 150.0) // 330 
                reuseIdentifier: PlainCellIdentifier]; 

本

 AFInstallerImageCell2 * plainCell2 = (AFInstallerImageCell2 *)[aGridView dequeueReusableCellWithIdentifier: PlainCellIdentifier]; 
       if(plainCell2 ==nil) { 
plainCell2 = [[AFInstallerImageCell2 alloc] initWithFrame: CGRectMake(0.0, 0.0, 200.0, 150.0) // 330 
                 reuseIdentifier: PlainCellIdentifier]; 
}