objective-c Archives - Page 2 of 28

ios, Programming

IT Nursery

What’s the best practice for naming Swift files that add extensions to existing objects?

It’s possible to add extensions to existing Swift object types using extensions, as described in the language specification. As a result, it’s possible ...

June 3, 2022
0 Comments

ios, Programming

IT Nursery

What is the right way to check for a null string in Objective-C?

I was using this in my iPhone app if (title == nil) { // do something } but it throws some exception, and ...

June 2, 2022
0 Comments

ios, Programming

IT Nursery

iOS: Modal ViewController with transparent background

I’m trying to present a view controller modally, with a transparent background. My goal is to let both the presenting and presented view ...

June 2, 2022
0 Comments

ios, Programming

IT Nursery

Storyboard doesn’t contain a view controller with identifier

I keep getting the following error: Storyboard (<UIStoryboard: 0x7ebdd20>) doesn't contain a view controller with identifier 'drivingDetails' This is the code: - (void)tableView:(UITableView ...

June 2, 2022
0 Comments

objective-c, Programming

IT Nursery

Objective-C implicit conversion loses integer precision ‘NSUInteger’ (aka ‘unsigned long’) to ‘int’ warning

I’m working through some exercises and have got a warning that states: Implicit conversion loses integer precision: ‘NSUInteger’ (aka ‘unsigned long’) to ‘int’ ...

June 2, 2022
0 Comments

objective-c, Programming

IT Nursery

How to change time and timezone in iPhone simulator?

How do I change time and time zone in the iPhone simulator? 12 Answers 12

June 2, 2022
0 Comments

ios, Programming

IT Nursery

UIButton inside a view that has a UITapGestureRecognizer

I have view with a UITapGestureRecognizer. So when I tap on the view another view appears above this view. This new view has ...

June 2, 2022
0 Comments

objective-c, Programming

IT Nursery

What do the plus and minus signs mean in Objective-C next to a method?

In Objective-C, I would like to know what the + and - signs next to a method definition mean. - (void)loadPluginsAtPath:(NSString*)pluginPath errors:(NSArray **)errors; ...

June 2, 2022
0 Comments

ios, Programming

IT Nursery

Add views in UIStackView programmatically

I’m trying to add views in UIStackView programmatically. For now My code is: UIView *view1 = [[UIView alloc]init]; view1.backgroundColor = [UIColor blackColor];...

June 2, 2022
0 Comments

ios, Programming

IT Nursery

Add a UIView above all, even the navigation bar

I want to display, above any other views, even the navigation bar, a kind of “pop-up” view that looks like this: full screen ...

June 2, 2022
0 Comments