iOS Learning: page jump (present)

////TWFXSECONDVIEWCONTROLLER.M//Demomultiview////Created by Lion User on 12-12-24.//Copyright (c) 2012 Lion User. All rights reserved.//#import "TWFXSecondViewController.h"#import "TWFXThirdViewController.h"@interfaceTwfxsecondviewcontroller ()@end@implementationTwfxsecondviewcontroller@synthesizeThirdviewcontroller;- (ID) Initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *) nibbundleornil{ Self=[Super Initwithnibname:nibnameornil Bundle:nibbundleornil]; if(self) {//Custom Initialization    }    returnSelf ;}- (void) viewdidload{[Super Viewdidload]; //Do any additional setup after loading the view from its nib.}- (void) didreceivememorywarning{[Super didreceivememorywarning]; //Dispose of any resources the can be recreated.}/*multi-View switch, if you jump from a view to B view, then A is the current view, b means that you want to jump to the view multi-view jump can be understood to have two parts: jump from A to B, B to return a. Note that is returned, not re-initiating the jump here is the second stage: return A from B Self.presentingviewcontroller is valid after the jump occurs, representing the previous view of the B attempt, where a view self.presentedviewcontroller is valid after the jump occurs, representing the next view of B view, Here for nil, thought that did not happen jump Self.parentviewcontroller represents B's parent attempt, also nil*/-(Ibaction) Btnclicgoback: (UIButton *) sender{void(^task) () = ^{NSLog (@"2self:%@", self); NSLog (@"2back ed%@", Self.presentedviewcontroller); NSLog (@"2back ing%@", Self.presentingviewcontroller); //NSLog (@ "Back par%@", Self.parentviewcontroller);printf"\ n");       }; //task (); //call Completion when the jump is complete, at which point the current view has been destroyed and Self.presentedviewcontroller Self.presentingviewcontroller are nil[self dismissviewcontrolleranimated:yes completion:nil]; Task ();//at this point, the current view has not been destroyed and Self.presentingviewcontroller represents the previous view}-(Ibaction) Btnclicktratofirst: (UIButton *) Sender {}/*This means jumping from B view to C view*/-(Ibaction) Btnclicktra: (UIButton *) Sender {if(Self.thirdviewcontroller = =Nil) {                /*The most commonly used initialization method Nibname represents the name of the Xib file, excluding the extension nibbundle the development of a nib file in that file bundle, such as in the home directory, you can directly use nil 
    */Self.thirdviewcontroller= [[[[Twfxthirdviewcontroller alloc] Initwithnibname:@"Twfxthirdviewcontroller"Bundle:nil]autorelease]; }        //animation effect of view toggleSelf.thirdViewController.modalTransitionStyle =uimodaltransitionstylecoververtical; void(^task) () = ^{NSLog (@"2self:%@", self); NSLog (@"2go ed%@", Self.presentedviewcontroller); NSLog (@"2go ing%@", Self.presentingviewcontroller); //NSLog (@ "Go par%@", self.parentviewcontroller);printf"\ n");    }; //task = ^ () {}; //task ();//no meaning before jumping            /*completion is a callback that is called Self.presentingviewcontroller (represents the previous view) after the viewdiddisear call of the current view (here is Twfxviewcontroller) Self.presentedviewcontroller for a view (indicates the next attempt) is C view*/[self Presentviewcontroller:thirdviewcontroller animated:yes completion:task]; }@end

iOS Learning: page jump (present)