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Answer : Use +[UIFont familyNames] to list all of the font family names known to the system. For each family name, you can then use +[UIFont fontNamesForFamilyName:] to list all of the font names known to the system. Try printing those out to see what name the system expects. Example code: static void dumpAllFonts() { for (NSString *familyName in [UIFont familyNames]) { for (NSString *fontName in [UIFont fontNamesForFamilyName:familyName]) { NSLog(@"%@", fontName); } } } Put that in your app, call it, and see what you get. If you see a name in the output that looks appropriate for your font, use it. Otherwise, perhaps you haven't properly added the font to your app. In swift 4.2+ use code given below: func dumpAllFonts() { for familyName in UIFont.familyNames { for fontName in UIFont.fontNames(forFamilyName: familyName) { print("\(fontName)") } } } ...

Answer : Stack views use intrinsic content size, so use layout constraints to define the dimensions of the views. There is an easy way to add constraints quickly (example): [view1.heightAnchor constraintEqualToConstant:100].active = true; Complete Code: - (void) setup { //View 1 UIView *view1 = [[UIView alloc] init]; view1.backgroundColor = [UIColor blueColor]; [view1.heightAnchor constraintEqualToConstant:100].active = true; [view1.widthAnchor constraintEqualToConstant:120].active = true; //View 2 UIView *view2 = [[UIView alloc] init]; view2.backgroundColor = [UIColor greenColor]; [view2.heightAnchor constraintEqualToConstant:100].active = true; [view2.widthAnchor constraintEqualToConstant:70].active = true; //View 3 UIView *view3 = [[UIView alloc] init]; view3.backgroundColor = [UIColor magentaColor]; [view3.heightAnchor constraintEqualToConstant:100].active = true; [view3.widthAnchor constraintEqualToConstant...