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The FBPlacePickerViewController class creates a controller object that manages
the user interface for displaying and selecting nearby places.
When the FBPlacePickerViewController view loads it creates a UITableView object
where the places near a given location will be displayed. You can access this view
through the tableView property.
The place data can be pre-fetched and cached prior to using the view controller. The cache is setup using an FBCacheDescriptor object that can trigger the data fetch. Any place data requests will first check the cache and use that data. If the place picker is being displayed cached data will initially be shown before a fresh copy is retrieved.
The delegate property may be set to an object that conforms to the FBPlacePickerDelegate
protocol. The delegate object will receive updates related to place selection and
data changes. The delegate can also be used to filter the places to display in the
picker.
| Inherits from: | FBGraphObjectPickerViewController |
| Declared in: | FBPlacePickerViewController.h |
locationCoordinateThe coordinates to use for place discovery.
@property (nonatomic) CLLocationCoordinate2D locationCoordinate;radiusInMetersThe radius to use for place discovery.
@property (nonatomic) NSInteger radiusInMeters;resultsLimitThe maximum number of places to fetch.
@property (nonatomic) NSInteger resultsLimit;searchTextThe search words used to narrow down the results returned.
@property (nonatomic,
copy) NSString *searchText;selectionThe place that is currently selected in the view. This is nil if nothing is selected.
@property (nonatomic,
retain,
readonly) id<FBGraphPlace> selection;cacheDescriptorWithLocationCoordinate:radiusInMeters:searchText:resultsLimit:fieldsForRequest:Creates a cache descriptor with additional fields and a profile ID for use with the
FBPlacePickerViewController object.
| 參數 | 說明 |
|---|---|
locationCoordinate | The coordinates to use for place discovery. |
radiusInMeters | The radius to use for place discovery. |
searchText | The search words used to narrow down the results returned. |
resultsLimit | The maximum number of places to fetch. |
fieldsForRequest | Addtional fields to fetch when making the Graph API call to get place data. |
+ (FBCacheDescriptor *) cacheDescriptorWithLocationCoordinate | |
CLLocationCoordinate | |
D | |
locationCoordinate | |
radiusInMeters: | (NSInteger)radiusInMeters |
searchText: | (NSString *)searchText |
resultsLimit: | (NSInteger)resultsLimit |
fieldsForRequest: | (NSSet *)fieldsForRequest; |
An FBCacheDescriptor object may be used to pre-fetch data before it is used by
the view controller. It may also be used to configure the FBPlacePickerViewController
object.
configureUsingCachedDescriptor:Configures the properties used in the caching data queries.
| 參數 | 說明 |
|---|---|
cacheDescriptor | The containing the cache query properties. |
- (void) configureUsingCachedDescriptor:(FBCacheDescriptor *)cacheDescriptor;Cache descriptors are used to fetch and cache the data used by the view controller. If the view controller finds a cached copy of the data, it will first display the cached content then fetch a fresh copy from the server.