Question

我在UiTableView上加载有问题我在4s iphone和9sec 4 iphone上有4秒延迟。我使用Async下载图像，速度非常快。

 -(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath     *)indexPath{
    static NSString *CellIdentifier = @"item2";
    NSLog(@"loading");
    MenuCell *cells = [tableView dequeueReusableCellWithIdentifier:CellIdentifier     forIndexPath:indexPath];
    NSLog(@"1");
    cells.Title.text=[name objectAtIndex:indexPath.row];
    [cells.Title setTextColor:[UIColor colorWithRed:(red/255.f) green:(green/255.f) blue:(blue/255.f) alpha:1.0f]];
    NSLog(@"2");

   NSLog(@"3");
   [cells.Image setImageWithURL:[NSURL URLWithString:[page_icon objectAtIndex:indexPath.row]]  placeholderImage:[UIImage imageNamed:@"clickgatemikro.png"]];
    NSLog(@"4");
   return cells;
}

我的输出：（4秒延迟）：

2014-10-17 17:28:19.504 Accounting[501:53015]   numberOfRowsInSection  TABLE COUNT  : 12
2014-10-17 17:28:19.513 Accounting[501:53015]   numberOfRowsInSection  TABLE COUNT  : 12
2014-10-17 17:28:19.515 Accounting[501:53015] loading
2014-10-17 17:28:23.609 Accounting[501:53015] 1
2014-10-17 17:28:23.611 Accounting[501:53015] 2
2014-10-17 17:28:23.612 Accounting[501:53015] 3
2014-10-17 17:28:23.624 Accounting[501:53015] 4
2014-10-17 17:28:23.625 Accounting[501:53015] loading
2014-10-17 17:28:23.635 Accounting[501:53015] 1
2014-10-17 17:28:23.635 Accounting[501:53015] 2
2014-10-17 17:28:23.636 Accounting[501:53015] 3
2014-10-17 17:28:23.638 Accounting[501:53015] 4
2014-10-17 17:28:23.639 Accounting[501:53015] loading
2014-10-17 17:28:23.645 Accounting[501:53015] 1
2014-10-17 17:28:23.651 Accounting[501:53015] 2
2014-10-17 17:28:23.652 Accounting[501:53015] 3
2014-10-17 17:28:23.654 Accounting[501:53015] 4
2014-10-17 17:28:23.698 Accounting[501:53015] FINISH

----------更新-------------

这是我的代码我使用plist在我的Mutablearray上加载我的数据，然后我调用reloadData

- (void)viewDidLoad {
[super viewDidLoad];
[self initVariables];
[self initplist];
self.mytableview.delegate = self;
self.mytableview.dataSource = self;

name = [plistDict objectForKey:@"title"];
image= [plistDict objectForKey:@"image"];


[self.mytableview reloadData];

}

-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
NSLog(@"  numberOfRowsInSection  TABLE COUNT  : %lu",(unsigned long)[name count]);
return [name count];
}


- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1; 
}

Answer 1

当您想要显示来自URL的图像时，请使用Async，因为它阻止了同步模式下的页面绘制，在图像dl期间使用占位符并将占位符替换为图像。

慢加载UiTableView

1 个答案: