Classes/ElementsSortedByAtomicNumberDataSource.m
/* |
Copyright (C) 2015 Apple Inc. All Rights Reserved. |
See LICENSE.txt for this sample’s licensing information |
Abstract: |
Provides the table view data for the elements sorted by atomic number. |
*/ |
#import "ElementsSortedByAtomicNumberDataSource.h" |
#import "PeriodicElements.h" |
#import "AtomicElementTableViewCell.h" |
@implementation ElementsSortedByAtomicNumberDataSource |
// protocol methods for "ElementsDataSourceProtocol" |
// return the data used by the navigation controller and tab bar item |
- (NSString *)navigationBarName { |
return @"Sorted by Atomic Number"; |
} |
- (NSString *)name { |
return @"Number"; |
} |
- (UIImage *)tabBarImage { |
return [UIImage imageNamed:@"number_gray.png"]; |
} |
// atomic number is displayed in a plain style tableview |
- (UITableViewStyle)tableViewStyle { |
return UITableViewStylePlain; |
} |
// return the atomic element at the index in the sorted by numbers array |
- (AtomicElement *)atomicElementForIndexPath:(NSIndexPath *)indexPath { |
return [[PeriodicElements sharedPeriodicElements] elementsSortedByNumber][indexPath.row]; |
} |
#pragma mark - UITableViewDataSource |
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { |
AtomicElementTableViewCell *cell = |
(AtomicElementTableViewCell *)[tableView dequeueReusableCellWithIdentifier:@"AtomicElementTableViewCell"]; |
// set the element for this cell as specified by the datasource. The atomicElementForIndexPath: is declared |
// as part of the ElementsDataSource Protocol and will return the appropriate element for the index row |
// |
cell.element = [self atomicElementForIndexPath:indexPath]; |
return cell; |
} |
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { |
// this table has only one section |
return 1; |
} |
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { |
// get the shared elements object |
// ask for, and return, the number of elements in the array of elements sorted by number |
return [[[PeriodicElements sharedPeriodicElements] elementsSortedByNumber] count]; |
} |
@end |
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