Some changes in the use of swift and object-c after iOS

First, compare the Viewcontroller as the root of the navigation to try the controller,

Methods of Object-c

szmyviewcontroller *mvc = [[szmyviewcontrolleralloc] init];

uinavigationcontroller *nav = [[uinavigationcontrolleralloc] Initwithrootviewcontroller : MVC];

self. window . Rootviewcontroller = nav;

Swift's approach

var viewcontroller = viewcontroller();

var nav = uinavigationcontroller(rootviewcontroller:viewcontroller);

self. Window!. Rootviewcontroller = nav;

Here's a look at the UI section: a comparison between the two

1-1, the use of the original UIView

UIView *myview = [[UIViewalloc] initwithframe:cgrectmake (0.0, 100.0, 200.0, 200.0)];

MyView. backgroundcolor = [uicolor colorwithred: 155/255.0 green: 155/255.0 Blue : 155/255.0 Alpha: 1.0];

[Self. View addsubview: MyView];

1-2. Use of Swift's UIView

var myView = UIView(frame:cgrectmake(0.0, 100.0, 200.0, 200.0))

MyView. backgroundcolor = uicolor(red:155/255.0, green:155/255.0, blue:155/255.0, alpha:1.0);

Self. View. Addsubview (MyView)

2-1 use of the original Uilabel

UILabel *mylabel= [[UILabel alloc] initwithframe:cgrectmake(0.0, 100.0 , 200.0, 200.0)];

MyLabel. backgroundcolor = [uicolor colorwithred: 155/255.0 green: 155/255.0 Blue : 155/255.0 Alpha: 1.0];

MyLabel. text = @ " original UILabel";

// set Text size

MyLabel. Font = [uifontsystemfontofsize:];

// Set the color of text

MyLabel. TextColor = [uicolorredcolor];

// Set the alignment of text

MyLabel. TextAlignment = nstextalignmentcenter;

MyLabel. Linebreakmode = nslinebreakbycharwrapping;

[Self. View addsubview: MyLabel];

The use of 2-2swift's Uilabel

var myLabel = UILabel(frame:cgrectmake(0.0, 100.0, 200.0, 200.0))

MyLabel. backgroundcolor = uicolor(red:155/255.0, green:155/255.0, blue:155/255.0, alpha:1.0);

MyLabel. text = "Swift 's UILabel";

// Set the size of the text

MyLabel. font = uifont. Systemfontofsize (30);

// Set text color

MyLabel. textcolor = uicolor. Redcolor ();

// Set the alignment of text

MyLabel. TextAlignment = nstextalignment. Center;

MyLabel. Linebreakmode = nslinebreakmode. Bycharwrapping;

Self. View. Addsubview (MyLabel)

3-1 use of the original UIButton

UIButton *mybtn = [uibuttonbuttonwithtype:uibuttontypecustom];

Mybtn. tag= 110;

mybtn. BackgroundColor = [uicolorredcolor];

[mybtn addTarget:self action:@selector(mybtnselector:) forcontrolevents:uicontroleventtouchupinside];

[mybtn settitle:@ " normal "forstate:uicontrolstatenormal];

[mybtn settitle:@ " highlight "forstate: Uicontrolstatehighlighted];

[Self. View addsubview: mybtn];

-(void) Mybtnselector: (UIButton *) btn{

NSLog (@ " button's tag value is ==%i", Btn.tag);

}

The use of 3-2swift's UIButton

var mybtn = UIButton. Buttonwithtype (uibuttontype. Custom) as? UIButton;

mybtn!. frame = CGRectMake (0.0, 100.0, 200.0, 200.0);

// Set the tag value of the button

mybtn!. tag= 110;

// Set background color

mybtn!. backgroundcolor = uicolor. Greencolor ();

// set the title and status of the normal button

Mybtn?. Settitle (" normal " , forstate: uicontrolstate. Normal)

Mybtn?. Settitle (" highlight " , forstate:uicontrolstate. highlighted);

// Set button's Click event button

Mybtn?. AddTarget (Self, Action:"Mybtnselector:", forControlEvents: uicontrolevents. Touchupinside);

Self. View. Addsubview (MYBTN);

//btn button's Click event

func mybtnselector (sender:UIButton!) {

let btnindex=sender!. tag;

println (" the tag value of the button is =%i", Btnindex);

}