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Boon Kiat Seah
66,664 PointsHow to add a Button Programmatically
This is the extra credit exercise on iOS Development > Build a Simple iPhone App > Making It Pretty
The code below cannot be compiled on iPhone Retina (4inch) iOS 6.1. On iOS 7.0, the build can compile but no button is seen. Can the expert help?
UIImage *image = [UIImage imageNamed:@"background.png"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[self.view insertSubview:imageView atIndex:0];
UIButton *predictButton = [[UIButton alloc] initWithFrame:CGRectMake(20, 20, 280, 37)];
predictButton = [UIButton buttonWithType:UIButtonTypeCustom];
[predictButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
UIImage *imageOff = [UIImage imageNamed:@"button_bg_off.png"];
UIImage *imageOn = [UIImage imageNamed:@"button_bg_on.png"];
[predictButton setBackgroundImage:imageOff forState:UIControlStateNormal];
[predictButton setBackgroundImage:imageOn forState:UIControlStateSelected];
[self.view addSubview:predictButton];
2 Answers
Amit Bijlani
Treehouse Guest TeacherCheck the name of the images and make sure you have added them to your project. If either of them are not true then you will not see the button.
Boon Kiat Seah
66,664 Pointsi've checked, it is still not working for me.
Amit Bijlani
Treehouse Guest TeacherDo you have an image view in your storyboard that could be hiding the button?