Classes/StatsViewController.m
/* |
Copyright (C) 2015 Apple Inc. All Rights Reserved. |
See LICENSE.txt for this sample’s licensing information |
Abstract: |
Displays statistics about each parser, including its average time to download the XML data, parse it, and the total average time from beginning the download to completing the parse. |
*/ |
#import "StatsViewController.h" |
#import "Statistics.h" |
#import "CocoaXMLParser.h" |
#import "LibXMLParser.h" |
#pragma mark - |
@implementation StatsViewController |
- (void)viewDidLoad { |
[super viewDidLoad]; |
// We use a slightly shorter than usual row height so that all the statistics fit on the page without scrolling. |
// This should be used cautiously, as it can easily result in a user interface that provides a bad experience. It is |
// acceptable here partly because the table does not support any user interaction. |
// |
// This could also be achieved using the UITableViewDelegate method tableView:heightForRowAtIndexPath: |
// However, this comes with a performance penalty, as it is called for each row in the table. Unless the rows |
// need to be of varying heights, the rowHeight property should be used. |
// |
self.tableView.allowsSelection = NO; |
self.tableView.rowHeight = 31; |
// Set the title |
self.title = @"Statistics"; |
} |
- (void)viewDidUnload { |
self.tableView = nil; |
[super viewDidUnload]; |
} |
- (void)viewWillAppear:(BOOL)animated { |
[super viewWillAppear:animated]; |
[self.tableView reloadData]; |
} |
#pragma mark - UITableViewDataSource |
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { |
return 2; |
} |
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { |
return 3; |
} |
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { |
static NSString *kStatisticsCellID = @"StatisticsCell"; |
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kStatisticsCellID]; |
if (cell == nil) { |
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:kStatisticsCellID]; |
} |
switch (indexPath.row) { |
case 0: { |
cell.textLabel.text = NSLocalizedString(@"Mean Download Time", @"Mean Download Time format"); |
cell.detailTextLabel.text = [NSString stringWithFormat:@"%.4fs", MeanDownloadTimeForParserType((XMLParserType)indexPath.section)]; |
} break; |
case 1: { |
cell.textLabel.text = NSLocalizedString(@"Mean Parse Time", @"Mean Parse Time format"); |
cell.detailTextLabel.text = [NSString stringWithFormat:@"%.4fs", MeanParseTimeForParserType((XMLParserType)indexPath.section)]; |
} break; |
case 2: { |
cell.textLabel.text = NSLocalizedString(@"Mean Total Time", @"Mean Total Time format"); |
cell.detailTextLabel.text = [NSString stringWithFormat:@"%.4fs", MeanTotalTimeForParserType((XMLParserType)indexPath.section)]; |
} break; |
} |
return cell; |
} |
- (NSString *)tableView:(UITableView *)tv titleForHeaderInSection:(NSInteger)section { |
NSUInteger numberOfRuns = NumberOfRunsForParserType((int)section); |
NSString *parserName = (section == 0) ? [CocoaXMLParser parserName] : [LibXMLParser parserName]; |
NSString *format = (numberOfRuns == 1) ? NSLocalizedString(@"%@ (%d run):", @"One Run format") : NSLocalizedString(@"%@ (%d runs):", @"Multiple Runs format"); |
return [NSString stringWithFormat:format, parserName, numberOfRuns]; |
} |
// action method for the button that resets statistics |
- (IBAction)resetStatistics:(id)sender { |
ResetStatisticsDatabase(); |
[self.tableView reloadData]; |
} |
@end |
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