Programming with iOS8 from scratch [common controls for iOS development] And ios8ios

Programming with iOS8 from scratch [common controls for iOS development] And ios8ios

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The AlertView control dialog box is displayed. Modify the HelloHaoMengZhu project code and add the AlertView:

-(IBAction) testAlert {NSString * str = [[NSString alloc] initWithFormat: @ "Hello, % @", txtField. text]; UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "prompt" message: str delegate: self cancelButtonTitle: @ "OK" otherButtonTitles: nil]; [str release]; [alert show]; [alert release];}-(void) alertView :( UIAlertView *) alertView didDismissWithButtonIndex :( NSInteger) buttonIndex {NSLog (@ "% @", @ "OK ");}

ActionSheet Control
ActionSheet and AlertView are similar in that they both give users a prompt. It is popped up from the bottom. It is usually used to identify potential dangerous or unrecoverable operations, such as deleting a data.
To use ActionSheet, we need to implement the UIActionSheetDelegate protocol in the H file. Among them, we often need to implement: actionSheet: didDismissWithButtonIndex:
This method is called when the ActionSheet disappears.
Modify the Hello-. h file

@interface HelloHaoMengZhuViewController : UIViewController{    UITextField *txtField;    UIActivityIndicatorView * myActivityView;        IBOutlet UIProgressView *Progress;NSTimer *timer;}

Add the Protocol UIActionSheetDelegate to the Hello_Controller.h file:

-(IBAction) testActionSheet {NSString * str = [[NSString alloc] initWithFormat: @ "Hello, % @", txtField. text]; UIActionSheet * action = [[UIActionSheet alloc] initWithTitle: @ "prompt" delegate: self cancelButtonTitle: @ "cancel" destructiveButtonTitle: @ "OK" otherButtonTitles: nil]; [str release]; [action showInView: self. view]; [action release];}-(void) actionSheet :( UIActionSheet *) actionSheet didDismissWithButtonIndex :( NSInteger) buttonIndex {if (buttonIndex = [actionSheet destructiveButtonIndex]) {NSLog (@ "% @", @ "OK");} else if (buttonIndex = [actionSheet cancelButtonIndex]) {NSLog (@ "% @", @ "cancel ");}}

Wait for controls
For some time-consuming processing, you need to use some wait controls to eliminate the user's waiting time.
Wait for the related controls to include:
UIActivityIndicatorView
UIProgressView
Design UI:

Implementation of UIActivityIndicatorView

-(IBAction)onClickButton2: (id)sender {if ([myActivityView isAnimating]) {[myActivityView stopAnimating];} else {[myActivityView startAnimating];}}

UIProgressView implementation

-(IBAction)start{Progress.progress = 0.0;timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(update) userInfo:nil repeats:YES];}

Code Description:
NSTimer can start a thread implicitly,
ScheduledTimerWithTimeInterval specifies the time when a thread is called to sleep. The selector specifies the update method.

-(Void) update {Progress. progress = Progress. progress + 0.1; if (Progress. progress = 1.0) {[timer invalidate]; UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "" message: @ ". avi download complete! "Delegate: self cancelButtonTitle: @" OK "otherButtonTitles: nil]; [alert show]; [alert release];}

Code Description:
The progress attribute of the UIProgressView control is 0.0 ~ 1.0 annoying range. At the starting position at 0.0, the progress reached 1.0 at 100%.

Master haomeng is devoted to his contribution and respects the author's Labor achievements. Do not repost them.

If the article is helpful to you, you are welcome to donate to the author, support haomeng master, the amount of donation is free, focusing on your mind ^_^

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Cocos2d-X source code download: point I send