IOS Tips Toast

IOS often encounter such situations, such as network connection errors, need to pop up a text prompt, and then automatically close

such as login success prompt login complete, later close

The implementation is as follows, we create a singleton, subsequent use only need to copy the code on the line

Create a class naming Myalertcenter control cue information reality and shutdown

At the same time, create inner class Myalert inherit uiview realistic hint content

The specific code is as follows

. h file

#import <UIKit/UIKit.h> @interface myalert:uiview-(id) init;-(void) Setmessagetext: (NSString *) message;@ End@interface myalertcenter:nsobject{        myalert *myalertview;//alertview    BOOL active;//is currently in use        }+ ( Myalertcenter *) defaultcenter;//single-generation alert controller-(void) Postalertwithmessage: (nsstring*) message;//popup text @end

. m file

#import "MyAlertCenter.h" @implementation myalertcenter+ (Myalertcenter *) defaultcenter{static Myalertcenter *default    Center;    if (!defaultcenter) {defaultcenter=[[myalertcenter alloc]init]; } return defaultcenter;} -(ID) init{if (! (        Self=[super Init]) return nil;    Myalertview = [[Myalert alloc] init];    Myalertview.alpha = 0.0f;        active = NO;        [[UIApplication Sharedapplication].keywindow Addsubview:myalertview]; return self;}    -(void) Postalertwithmessage: (nsstring*) message{//Determine if the current is in use if (!active) {[Self showalerts:message];    }}-(void) Showalerts: (NSString *) str {//start using, set current to use status active = YES;    Myalertview.alpha = 0;    [[UIApplication Sharedapplication].keywindow Addsubview:myalertview];    [Myalertview SETMESSAGETEXT:STR];        Myalertview.center = [UIApplication sharedapplication].keywindow.center;    Set animation [UIView Beginanimations:nil Context:nil];    [UIView setanimationduration:0.2]; [UIView SetAnimationdelegate:self];    [UIView setanimationdidstopselector: @selector (ANIMATIONSTEP2)];    Myalertview.alpha = 0.8; [UIView commitanimations];}    -(void) animationstep2{[UIView Beginanimations:nil Context:nil];    [UIView setanimationdelay:1.0];    [UIView setanimationdelegate:self];    [UIView setanimationdidstopselector: @selector (ANIMATIONSTEP3)];    Myalertview.alpha = 0; [UIView commitanimations];}    -(void) animationstep3{[Myalertview Removefromsuperview];    Active=no; } @end @implementation Myalertcgrect messagerect;    NSString *text;-(ID) init{self=[super initwithframe:cgrectmake (0, 0, 100, 10)];    if (self) {messagerect =cgrectinset (self.bounds, 10, 10); } return self;}    -(void) Setmessagetext: (NSString *) message{text=message;        Nsdictionary *attribute = @{nsfontattributename: [Uifont systemfontofsize:14]}; Cgsize S=[text boundingrectwithsize:cgsizemake (0) options:nsstringdrawingtruncateslastvisibleline | NsstringdrawinguSeslinefragmentorigin |        Nsstringdrawingusesfontleading Attributes:attribute context:nil].size;        Self.bounds = CGRectMake (0, 0, s.width+40, s.height+15+15);    Messagerect.size = s;    MessageRect.size.height + = 5;    messagerect.origin.x = 20;        MESSAGERECT.ORIGIN.Y = 15;    [Self setneedslayout]; [Self setneedsdisplay];} -(void) DrawRect: (cgrect) rect{nsdictionary* attrs [Email protected]{nsforegroundcolorattributename:[uicolor                           Whitecolor], Nsfontattributename:[uifont fontwithname:@ "Americantypewriter" size:18]    }; [Text Drawinrect:messagerect withattributes:attrs]; Limits the text to a rectangular boundary, preventing the rectangle from stretching;} @end

Well, the Myalertcenter class implementation is complete.

If you need to use it, we can call it directly.

    [[Myalertcenter Defaultcenter] postalertwithmessage:@ "landing success"];

It's easier.

If we need to adjust the actual time of the cue content

can find

-(void) animationstep2{    [UIView beginanimations:nil context:nil];    [UIView setanimationdelay:1.0]; Display time    [UIView setanimationdelegate:self];    [UIView setanimationdidstopselector: @selector (ANIMATIONSTEP3)];    Myalertview.alpha = 0;    [UIView commitanimations];}

Second line of code adjustment

If you want to adjust where the hint appears (the default reality in the example is the middle of the screen)

can find

    Myalertview.center = [UIApplication sharedapplication].keywindow.center; Set Location

Re-assign Myalertview.center to the value

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IOS Tips Toast