Question

我正在尝试创建一个显示日历的应用程序，并且只要日历上的一天（每天都是带有轻击手势的UIView）被点击，那天的所有日历约会都应显示在UITableView的。我有这个工作，但是在点击发生和数据实际填充到UITableView之间存在很大的延迟。这是我的代码：

EKEventStore *store = [[EKEventStore alloc] init];

//Access Granted to Calendar by user
[store requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {

// Create the start date components
NSDateFormatter *startFormatter = [[NSDateFormatter alloc]init];
[startFormatter setDateFormat:@"MM/dd/yyyy hh:mm a"];

NSString *monthNumberString = [NSString stringWithFormat:@"%i", month];

NSString *startDateString = [[[[[monthNumberString stringByAppendingString:@"/"] stringByAppendingString:dLabel.text] stringByAppendingString:@"/"] stringByAppendingString:yearString] stringByAppendingString:@" 12:01 am"];

NSDate *start = [startFormatter dateFromString:startDateString];

NSLog(@"Start Date: %@", startDateString);

// Create the end date components
NSDateFormatter *endFormatter = [[NSDateFormatter alloc]init];
[endFormatter setDateFormat:@"MM/dd/yyyy hh:mm a"];

NSString *endDateString = [[[[[monthNumberString stringByAppendingString:@"/"] stringByAppendingString:dLabel.text] stringByAppendingString:@"/"] stringByAppendingString:yearString] stringByAppendingString:@" 11:59 pm"];

NSDate *end = [endFormatter dateFromString:endDateString];
NSLog(@"End Date: %@", endDateString);

// Create the predicate from the event store's instance method
NSPredicate *predicate = [store predicateForEventsWithStartDate:start
                                                            endDate:end
                                                          calendars:nil];


// Fetch all events that match the predicate
events = [store eventsMatchingPredicate:predicate];

//Sort the array
events = [events sortedArrayUsingSelector:@selector(compareStartDateWithEvent:)];

int eventCount = [events count];

NSLog(@"%i", eventCount);

for (int i=0; i<eventCount; i++) {
    EKEvent *theEvent = [events objectAtIndex:i];    
    NSLog (@"Element %i = %@", i, theEvent.title);
}

UITableView *dayTableView = [[UITableView alloc] initWithFrame:CGRectMake(360, 0, 300, 550)
                                                                 style:UITableViewStylePlain];
dayTableView.backgroundColor = lightBlueColor;
dayTableView.separatorColor = [UIColor clearColor]; 
dayTableView.delegate = self;
dayTableView.dataSource = self;

[super addSubview:dayTableView];

}];

UITableview代表函数：

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    NSLog (@"I made a section!");
    return 1;    //count of section


}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    NSLog (@"I made %i rows!", [events count]);
    return [events count];
}



-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *c = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"mycell"];

    EKEvent *theEvent = [events objectAtIndex:indexPath.row];

    c.textLabel.text = theEvent.title;

    NSLog (@"Cell %i = %@", indexPath.row, theEvent.title);



    //c.textLabel.text = @"Calendar Event Goes Here";
    c.textLabel.textColor = [UIColor whiteColor];

     //NSLog (@"I made a cell!");

    return c;    


}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{




    return 35;
}

非常感谢任何帮助。

Answer 1

如果没有分析，很难说代码的瓶颈是什么。但是，根据以前的经验，我会说这是看起来像

的行

NSString *startDateString = [[[[[monthNumberString stringByAppendingString:@"/"] stringByAppendingString:dLabel.text] stringByAppendingString:@"/"] stringByAppendingString:yearString] stringByAppendingString:@" 12:01 am"];

至少如果它被称为+ 20000x（或其他）一秒钟。首先，将其写成

会更方便

NSString *startDateString = [NSString stringWithFormat:@"%@/%@/%@ 12:01 am", monthNumberString, dLabel.text, yearString];

但我担心这不会加速你的计划。我建议回到普通的C代码并使用例如而是sprintf。您可以查找它的语法here以及一些使用示例。

Answer 2

我找到了答案。问题出在这里： [store requestAccessToEntityType：EKEntityTypeEvent completion：^（BOOL grant，NSError * error）{

在iOS6和iOS5上访问事件存储的方式不同。这是一个显示正确方法的链接：

http://fostah.com/ios/2012/09/28/ios6-event-edit.html

UITableView人口缓慢

2 个答案: