unable to dequeue a cell with identifier Cell - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'
2013-03-31 11:58
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区别:
1 第二个方法在SDK5.0是运行不起来的。
2 如果需要使用这个方法,你必须使用配套的方法来一起用,下面两个配套方法:
注意看上面的注释
3 比如你已经用NIB做了一个Cell,或者自定义了一个Cell。我们在你创建UITableView的时候,就可以顺带
这样你在
这个方法里,你就可以省下这些代码:
而只需要
- (id)dequeueReusableCellWithIdentifier:(NSString *)identifier; - (id)dequeueReusableCellWithIdentifier:(NSString *)identifier forIndexPath:(NSIndexPath *)indexPath NS_AVAILABLE_IOS(6_0); // newer
1 第二个方法在SDK5.0是运行不起来的。
2 如果需要使用这个方法,你必须使用配套的方法来一起用,下面两个配套方法:
// Beginning in iOS 6, clients can register a nib or class for each cell. // If all reuse identifiers are registered, use the newer -dequeueReusableCellWithIdentifier:forIndexPath: to guarantee that a cell instance is returned. // Instances returned from the new dequeue method will also be properly sized when they are returned. - (void)registerNib:(UINib *)nib forCellReuseIdentifier:(NSString *)identifier NS_AVAILABLE_IOS(5_0); - (void)registerClass:(Class)cellClass forCellReuseIdentifier:(NSString *)identifier NS_AVAILABLE_IOS(6_0);
注意看上面的注释
3 比如你已经用NIB做了一个Cell,或者自定义了一个Cell。我们在你创建UITableView的时候,就可以顺带
self.tableView.backgroundColor = xxxx; [self.tableView registerClass:[CustomCell class] forCellReuseIdentifier:@"CustomCell"];
这样你在
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
这个方法里,你就可以省下这些代码:
static NSString *CellIdentifier = @"Cell"; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; //设置你的cell }
而只需要
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];
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