How to display temporary popup message on iPhone/iPad/iOS

Question

I\'d like to display a temporary message on the iPhone/iPad displaying confirmation of an action, or some quick status about some background activity.

Is there a st

Answer 1

I created an Android-Kind toast, pretty simple because I don't need more functionality in it for now.

When it is shown it is added at the bottom of the parent's view, so if that view is the VC's view then it will be at the bottom center of the device.

The frame is autoadjusted to the text length.

You use it doing: [self.view addSubview: [[ToastAlert alloc] initWithText: @"Sent"]];, it will be auto-removed so no reference is needed.

I haven't implemented this, but you can create a static method to shorten and clarify the instruction, sort of: [ToastAlert showText: @"Sent" inView: self.view];.

The class:

ToastAlert.h

@interface ToastAlert : UILabel {

}

- (id)initWithText: (NSString*) msg;

@end

ToastAlert.m

#import "ToastAlert.h"
#import 

@implementation ToastAlert

#define POPUP_DELAY  1.5

- (id)initWithText: (NSString*) msg
{

    self = [super init];
    if (self) {

        self.backgroundColor = [UIColor colorWithWhite:0 alpha:0.7];
        self.textColor = [UIColor colorWithWhite:1 alpha: 0.95];
        self.font = [UIFont fontWithName: @"Helvetica-Bold" size: 13];
        self.text = msg;
        self.numberOfLines = 0;
        self.textAlignment = UITextAlignmentCenter;
        self.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;


    }
    return self;
}

- (void)didMoveToSuperview {

    UIView* parent = self.superview;

    if(parent) {

        CGSize maximumLabelSize = CGSizeMake(300, 200);
        CGSize expectedLabelSize = [self.text sizeWithFont: self.font  constrainedToSize:maximumLabelSize lineBreakMode: NSLineBreakByTruncatingTail];

        expectedLabelSize = CGSizeMake(expectedLabelSize.width + 20, expectedLabelSize.height + 10);

        self.frame = CGRectMake(parent.center.x - expectedLabelSize.width/2,
                                parent.bounds.size.height-expectedLabelSize.height - 10,
                                expectedLabelSize.width,
                                expectedLabelSize.height);

        CALayer *layer = self.layer;
        layer.cornerRadius = 4.0f;

        [self performSelector:@selector(dismiss:) withObject:nil afterDelay:POPUP_DELAY];
    }
}

- (void)dismiss:(id)sender {
    // Fade out the message and destroy self
    [UIView animateWithDuration:0.6  delay:0 options: UIViewAnimationOptionAllowUserInteraction
                     animations:^  { self.alpha = 0; }
                     completion:^ (BOOL finished) { [self removeFromSuperview]; }];
}

@end