Fix UILabel not auto-resizing it's height when using autolayout in landscape mode with a multi line label

UILabel+AutoLayoutFix.m

@import UIKit;
#import "JRSwizzle.h" // <- from cocoapods: https://cocoapods.org/pods/JRSwizzle

// Stackoverflow question: http://stackoverflow.com/questions/17491376/ios-autolayout-multi-line-uilabel
// Answer see: http://stackoverflow.com/a/23696158/518532

@interface UILabel (AutoLayoutFix)
- (void)DST_setBounds:(CGRect)bounds;
@end

@implementation UILabel (AutoLayoutFix)

+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Class class = [self class];
        NSError *error;
        if (![class jr_swizzleMethod:@selector(setBounds:) withMethod:@selector(DST_setBounds:) error:&error]) {
            NSLog(@"Swizzling %@ setBounds: failed, %@", class, error);
        }
    });
}

- (void)DST_setBounds:(CGRect)bounds {
    [self DST_setBounds:bounds]; // swizzled
    
    if (bounds.size.width != self.preferredMaxLayoutWidth) {
        self.preferredMaxLayoutWidth = self.bounds.size.width;
    }
}

@end

Just include into Xcode project, no call needed.