Question

关注iOS6 eventKit和新的隐私设置我使用以下代码 - 这在iOS6设备上完全正常。

尽管如此，我希望相同的代码也适用于iOS 5.x的设备，我希望不要两次写“相同的代码” - 似乎错了。

任何人都可以协助优雅的解决方案吗？

 EKEventStore *eventStore = [[EKEventStore alloc] init];
    [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {

// some code 


}];

Answer 1

我正在使用它：

void (^addEventBlock)();

addEventBlock = ^
{
    NSLog(@"Hi!");
};

EKEventStore *eventStore = [[UpdateManager sharedUpdateManager] eventStore];

if ([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)])
{
    [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error)
     {
         if (granted)
         {   
             addEventBlock();
         }
         else
         {
             NSLog(@"Not granted");
         }
     }];
}
else
{
    addEventBlock();
}

我认为应该减少代码重复。

Answer 2

如果您在带有EKEventEditViewController的modalviewcontroller中显示事件，iOS会自动显示一个视图，说明如果权限被拒绝该怎么办。所以，我这样做：

在viewDidLoad中：

eventStore = [[EKEventStore alloc] init];

在用于添加事件的方法中：

if ([eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)])
{
    __block typeof (self) weakSelf = self; // replace __block with __weak if you are using ARC
    [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error)
     {
         if (granted)
         {   
             [weakSelf performSelectorOnMainThread:@selector(addEventToCalendar) withObject:nil waitUntilDone:YES];
         }
         else
         {
             NSLog(@"Not granted");
         }
     }];
}
else
{
    [self addEventToCalendar];
}

Answer 3

我有一个带

的EventUtil.m文件

+(void)proxyForIOS6EventKitToCallFunction:(SEL)function WithViewController:(UIViewController*)viewController {
    #pragma clang diagnostic push
    #pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    AppDelegate *app = (AppDelegate*)[[UIApplication sharedApplication] delegate];
    if([app.eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)]) {
        // For iOS 6
        MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:viewController.view animated:YES];
        hud.labelText = @"";
        //invoke requestAccessToEntityType...
        [app.eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
            //Handle the response here…
            //Note: If you prompt the user, make sure to call the main thread
            if (granted == YES) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    [viewController performSelector:function];
                });
            }
        }];
    }
    else {
        [viewController performSelector:function];
    }
    #pragma clang diagnostic pop
}

在我想访问日历的视图控制器中，我导入了EventUtil.h文件并调用了这个函数：

[EventUtil proxyForIOS6EventKitToCallFunction:@selector(displayModifyCalendarAlertView) WithViewController:self];

displayModifyCalendarAlertView是我要调用的函数，如果给出了日历权限（iOS6或iOS＆lt; 6）。

requestAccessToEntity iOS6-向后兼容性 - EKEventStore

3 个答案: