我对此感到非常困惑。
我正在尝试使用 Xcode 中的单个视图模板以编程方式创建一个分组的 UITableView。在网上看一些例子,没有什么秘密,这样做的方法很简单。我不确定我的实现是对还是错,因为方法 tableView:cellForRowAtIndexPath: 从未被调用,但其他的被调用并返回一个大于 0 的整数。
有代码,欢迎提出建议。谢谢,
#import "ViewController.h"
#import "SimpleCell.h"
@interface ViewController () <UITableViewDelegate, UITableViewDataSource>
@property (nonatomic, strong) UITableView *table;
@property (nonatomic, strong) NSArray *sections;
@property (nonatomic, strong) NSArray *section1;
@property (nonatomic, strong) NSArray *section2;
@property (nonatomic, strong) NSArray *section3;
@end
@implementation ViewController
static NSString * const CellIdentfier = @"Cell";
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self.view addSubview:self.table];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[table]|"
options:0
metrics:nil
views:@{@"table": self.table}]];
dispatch_async(dispatch_get_main_queue(), ^{
[self.table reloadData];
});
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (UITableView *)table
{
if(!_table)
{
_table = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
_table.delegate = self;
_table.dataSource = self;
_table.translatesAutoresizingMaskIntoConstraints = NO;
_table.rowHeight = 34.0f;
_table.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
_table.backgroundColor = [UIColor grayColor];
_table.showsVerticalScrollIndicator = NO;
[_table registerClass:[SimpleCell class] forCellReuseIdentifier:CellIdentfier];
}
return _table;
}
- (NSArray *)sections
{
if(!_sections)
{
_sections = @[@"Section1", @"Section2", @"Section3"];
}
return _sections;
}
- (NSArray *)section1
{
if(!_section1)
{
_section1 = @[@"Player a", @"Player b", @"Player c"];
}
return _section1;
}
- (NSArray *)section2
{
if(!_section2)
{
_section2 = @[@"Zone a", @"Zone b", @"Zone c"];
}
return _section2;
}
- (NSArray *)section3
{
if(!_section3)
{
_section3 = @[@"Area a", @"Area b", @"Area c"];
}
return _section3;
}
#pragma mark - UI Table View Delegate impl
#pragma mark - UI Table View Datasource impl
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
DLog();
SimpleCell *cell = [self.table dequeueReusableCellWithIdentifier:CellIdentfier];
if(!cell)
cell = [[SimpleCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentfier];
cell.label.text = [NSString stringWithFormat:@"Section: %i Row: %i", indexPath.section, indexPath.row];
return cell;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSInteger total = 0;
if(section == 0) total = self.section1.count;
if(section == 1) total = self.section2.count;
if(section == 2) total = self.section3.count;
DLog(@"Rows: %i", total);
return total;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
DLog();
return self.sections.count;
}
@end