(material source) Swanzhu iOS (ii) UI _nstimer

zyviewcontroller.m//selectortime////Created by Mac on 15-8-3.//Copyright (c) 2015 zhiyou. All rights reserved.//#import "ZYViewController.h" @interface Zyviewcontroller () {//global variable Nstimer *timer;} @end @implementation zyviewcontroller-(ID) initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *)    nibbundleornil{self = [super Initwithnibname:nibnameornil Bundle:nibbundleornil]; if (self) {//Custom initialization} return to self;} Idea//1 Create 5 labels to display numbers and colons//2 turn on timer (set three counters: seconds counter, minute counter, hour counter) use the concatenation string method to make the numbers appear on the label;//3 create nstimer-(void)        viewdidload{[Super Viewdidload];    UILabel *label1=[[uilabel Alloc] Initwithframe:cgrectmake (40, 100, 60, 60)];    [email protected] "00";    label1.tag=1;    Label1.backgroundcolor=[uicolor Bluecolor];    Label1.textalignment=nstextalignmentcenter;    Label1.textcolor=[uicolor Whitecolor];    [Self.view Addsubview:label1];   UILabel *label2=[[uilabel Alloc] initwithframe:cgrectmake (100, 100, 10, 60)]; [email protected] ":";        [Self.view Addsubview:label2];    UILabel *label3=[[uilabel Alloc] Initwithframe:cgrectmake (110, 100, 60, 60)];    [email protected] "00";    label3.tag=3;    Label3.backgroundcolor=[uicolor Bluecolor];    Label3.textcolor=[uicolor Whitecolor];    Label3.textalignment=nstextalignmentcenter;            [Self.view Addsubview:label3];    UILabel *label4=[[uilabel Alloc] Initwithframe:cgrectmake (170, 100, 10, 60)];    [email protected] ":";            [Self.view Addsubview:label4];    UILabel *label5=[[uilabel Alloc] initwithframe:cgrectmake (180, 100, 60, 60)];    [email protected] "00";    label5.tag=5;    Label5.backgroundcolor=[uicolor Bluecolor];    Label5.textalignment=nstextalignmentcenter;    Label5.textcolor=[uicolor Whitecolor];            [Self.view Addsubview:label5]; Turn on timer timer=[nstimer scheduledtimerwithtimeinterval:1 target:self selector: @selector (onTimer) Userinfo:nil repeat        S:yes]; Btn1=[uibutton ButtonwithtyPe:uibuttontypecustom];    Btn1.frame=cgrectmake (50, 300, 50, 50);    Btn1.backgroundcolor=[uicolor Redcolor];    [Btn1 settitle:@ "pause" forstate:uicontrolstatenormal];    [Btn1 addtarget:self Action: @selector (click) forcontrolevents:uicontroleventtouchupinside];        [Self.view ADDSUBVIEW:BTN1];    Btn2=[uibutton Buttonwithtype:uibuttontypecustom];    Btn2.frame=cgrectmake (130, 300, 50, 50);    Btn2.backgroundcolor=[uicolor Redcolor];    [btn2 settitle:@ "Qing 0" forstate:uicontrolstatenormal];    [Btn2 addtarget:self Action: @selector (OnClick) forcontrolevents:uicontroleventtouchupinside];    [Self.view ADDSUBVIEW:BTN2];    }-(void) click{open=!open;        if (open==yes) {[btn1 settitle:@ ' start ' forstate:uicontrolstatenormal];        [Timer invalidate];            Timer=nil;      }else{[btn1 settitle:@ "pause" forstate:uicontrolstatenormal];            timer= [Nstimer scheduledtimerwithtimeinterval:1 target:self selector: @selector (OnTimer) Userinfo:nil Repeats:yes]; }}-(Void) onclick{UILabel *label1= (UILabel *) [Self.view viewwithtag:1];   UILabel *label3= (UILabel *) [Self.view Viewwithtag:3];    UILabel *label5= (UILabel *) [Self.view viewwithtag:5];    [email protected] "00"; scount=mcount=hcount=0;}    -(void) ontimer{//viewwithtag through the tag to find the control//must be found in the parent view UILabel *label1= (UILabel *) [Self.view viewwithtag:1];    UILabel *label3= (UILabel *) [Self.view Viewwithtag:3];    UILabel *label5= (UILabel *) [Self.view viewwithtag:5];            Change the title scount++;        if (scount==59) {scount=0;        mcount++;        [Self setlabelanimations:label3];                Label3.text=[nsstring stringwithformat:@ "%d", MCount];            if (mcount==59) {mcount=0;            hcount++;            [Self setlabelanimations:label1];        Label1.text=[nsstring stringwithformat:@ "%d", Hcount];    }} label5.text=[nsstring stringwithformat:@ "%d", Scount]; 2 animating (label animating, uploading labels to animations) [self setlabelanimations:label5];    }-(void) Setlabelanimations: (UILabel *) labels{[UIView Beginanimations:nil Context:nil];    [UIView setanimationduration:0.9];    [UIView Setanimationtransition:6 forview:labels Cache:yes]; [UIView commitanimations];}    -(void) didreceivememorywarning{[Super didreceivememorywarning]; Dispose of any resources the can be recreated.} @end

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(material source) Swanzhu iOS (ii) UI _nstimer