ios_21 buy _popover adapt to ipad screen switch

Finally:

Code snippet:

dockitemlocation.m//Handsome _ buy////Created by Beyond on 14-8-13.//Copyright (c) 2014 Com.beyond. All rights reserved.//#import "DockItemLocation.h"//click on the locationbtn above the dock to eject the PopOver encapsulated controller, above it is the search bar, below is tableview# Import "CityLocationController.h"//button above is the picture, the following is the text, this is the picture on the height of the ratio of # define KIMAGEHEIGHTRATIOINBTN 0.5@interface Dockitemlocation () <uipopovercontrollerdelegate>{//popover Controller, after it is created, the Show method is displayed, so it cannot be a local variable and must be remembered with member variables, Otherwise, the method Btnclick call completion is destroyed, how to display pinch?
    Uipopovercontroller *_popoverctrl;}    @end @implementation dockitemlocation-(ID) initWithFrame: (cgrect) frame{self = [super Initwithframe:frame];                if (self) {///1. Call the parent class method, set the internal picture [self seticon:@ "ic_district.png" selectedicon:@ "Ic_district_hl.png"];                2. Self-active telescopic self.autoresizingmask = Uiviewautoresizingflexibletopmargin;        3. Set the default text [self settitle:@ "forstate:uicontrolstatenormal];        Self.titleLabel.font = [Uifont systemfontofsize:16];        Self.titleLabel.textAlignment = Nstextalignmentcenter;        [Self Settitlecolor:[uicolor whitecolor] forstate:uicontrolstatedisabled];                [Self Settitlecolor:[uicolor graycolor] forstate:uicontrolstatenormal];                4. Set picture Properties Self.imageView.contentMode = Uiviewcontentmodecenter; 5. Tap "Location Locator" to eject a popover controller [self addtarget:self Action: @selector (locationbtnondockclicked) Forcontroleven    Ts:uicontroleventtouchdown]; } RETurn self;}    5. Monitor Click "Location Positioning", pop up a popover controller-(void) locationbtnondockclicked{//disable, just click once self.enabled = NO; Click on the locationbtn above the dock to eject the PopOver encapsulated controller, above it is the search bar, below is tableview citylocationcontroller *CITYVC = [[        Citylocationcontroller alloc] init]; The only controller that is not inherited from Uiviewcontroller, which inherits from the NSObject//popover controller, is created, the Show method is displayed, so it cannot be a local variable and must be remembered with member variables,    Otherwise, the method Btnclick call completion is destroyed, how to display pinch?    _popoverctrl = [[Uipopovercontroller alloc] INITWITHCONTENTVIEWCONTROLLER:CITYVC];    Set the display size of this popover controller _popoverctrl.popovercontentsize = Cgsizemake (320, 480);    Agent, monitor PopOver controller xx Event _popoverctrl.delegate = self;        As other methods are also shown, _popoverctrl, so extracted into their own definition method [self Showpopoverctrl]; As the screen rotates, the popover point of the popup is not correct, so it is necessary to register to monitor the screen rotation notification//First remove the listener to ensure robustness [[Nsnotificationcenter Defaultcenter] Removeobserv    Er:self name:uideviceorientationdidchangenotification Object:nil]; Add a listener, and once the device appears uideviceorientationdidchangenotification, the Observer selector method is called [[nsnotificationceNter Defaultcenter] addobserver:self selector: @selector (screendidrotated) Name: Uideviceorientationdidchangenotification Object:nil];} 5-1, because the hearing screen rotation, but also to show _popoverctrl again, so extracted into their own definition method-(void) showpopoverctrl{//show where?
 If the target view is self, then rect uses bounds, because the origin of bounds is relative to itself//if the target view is Self.superview, then rect uses frame, because the frame's origin is relative to the parent control [_ Popoverctrl presentPopoverFromRect:self.bounds inview:self Permittedarrowdirections:uipopoverarrowdirectionany Animated:yes];}    5-2, add a listener, once the device appears uideviceorientationdidchangenotification, it will call the Observer Selector Method-(void) screendidrotated{    if (_popoverctrl.popovervisible) {//1.                Close the previous position above the _popoverctrl [_popoverctrl Dismisspopoveranimated:no];    2.    0.5 seconds after creating a new location on the _popoverctrl [self performselector: @selector (Showpopoverctrl) Withobject:nil afterdelay:0.5]; }} #pragma mark-popover proxy Method-(void) Popovercontrollerdiddismisspopover: (Uipopovercontroller *) popovercontroller{//        Before disappearing, let the position button recover to be able to click the state self.enabled = YES; Before disappearing, that is, when the PopOver is destroyed. Listener to remove the Register (notification) [[Nsnotificationcenter Defaultcenter] removeobserver:self name: Uideviceorientationdidchangenotification Object:nil];} #pragma mark-Removes the current monitor of the screen from the controller, preventing the Wild Pointer-(void) Dealloc{[[Nsnotificationcenter Defaultcenter] removeobserver:self];} #pragma mark-Overwrite the frame-(cgrect) in the button with the Adjust picture and text imagerectforcontentrect: (cgrect) contentrect{cgfloat btnw = Contentrec    T.size.width;    CGFloat IMGH = contentRect.size.height * KIMAGEHEIGHTRATIOINBTN; Return CGRectMake (0, 0, BTNW, IMGH);}    -(CGRect) Titlerectforcontentrect: (cgrect) contentrect{cgfloat btnw = contentRect.size.width;    CGFloat texth = contentRect.size.height * (1-KIMAGEHEIGHTRATIOINBTN);    Text in the following, picture on top cgfloat texty = Contentrect.size.height-texth; Return CGRectMake (0, Texty, BTNW, texth);} @end

ios_21 buy _popover adapt to ipad screen switch