iOS筆記：雜記 (1)

NSDictionary

只能存放OBJECT.

// 透過KEY去取值
NSString *BlueString = [myDictionary objectForKey:@"ocean color"];

NSNumber

NSNumber *number = [NSNumber numberWithInt:5];
NSLog(@"%@", number); //5

上述範例也等於 @5. This is a shorthand for creating a NSNumber object.

define

#define PLANET_NAME @"Planet Name"

PLANET_NAME : @"Mercury"

Literals

Class Method

曾經遇到的問題：
‘NSInternalInconsistencyException’, reason: ‘-[UITableViewController loadView] loaded the “vXZ-lx-hvc-view-kh9-bI-dsS” nib but didn’t get a UITableView.’

解法：changing your @interface SearchViewController : UITableViewController to @interface SearchViewController : UIViewController

Dismissing ViewControllers

When Using a push segue, we can use the method popViewController if have multiple ViewControllers.
And if we have a modal segue, that can pop or remove a single ViewController from our stack by using the method dismissViewController.

[self dismissViewControllerAnimated:YES completion:nil]`;

[self.navigationController popViewControllerAnimated:YES];

參考資料：
1. http://stackoverflow.com/questions/20234875/loaded-the-nib-but-didnt-get-a-uitableview?lq=1
2. http://www.slideshare.net/sysheen/ios-25194974 (初學者教學)