改变UIAlertController的标题、内容的字体和颜色

 

#import "ViewController.h"

 

@interfaceViewController ()

 

@end

 

@implementation ViewController

 

- (void)viewDidLoad {

  [superviewDidLoad];

  // Do any additional setup after loading the view, typically from a nib.

 

}

 

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {

  UIAlertController *alertController = [UIAlertControlleralertControllerWithTitle:@"提示"message:@"提示内容"preferredStyle:UIAlertControllerStyleAlert];

  

  UIAlertAction *defaultAction = [UIAlertActionactionWithTitle:@"Default"style:UIAlertActionStyleDefaulthandler:nil];

  UIAlertAction *destructiveAction = [UIAlertActionactionWithTitle:@"Destructive"style:UIAlertActionStyleDestructivehandler:nil];

  UIAlertAction *cancelAction = [UIAlertActionactionWithTitle:@"Cancel"style:UIAlertActionStyleCancelhandler:nil];

  

  [alertController addAction:defaultAction];

  [alertController addAction:destructiveAction];

  [alertController addAction:cancelAction];

  

  

  //修改title

  NSMutableAttributedString *alertControllerStr = [[NSMutableAttributedStringalloc] initWithString:@"提示"];

  [alertControllerStr addAttribute:NSForegroundColorAttributeNamevalue:[UIColorredColor] range:NSMakeRange(0, 2)];

  [alertControllerStr addAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:17] range:NSMakeRange(0, 2)];

  [alertController setValue:alertControllerStr forKey:@"attributedTitle"];

  

  //修改message

  NSMutableAttributedString *alertControllerMessageStr = [[NSMutableAttributedStringalloc] initWithString:@"提示内容"];

  [alertControllerMessageStr addAttribute:NSForegroundColorAttributeNamevalue:[UIColorgreenColor] range:NSMakeRange(0, 4)];

  [alertControllerMessageStr addAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:20] range:NSMakeRange(0, 4)];

  [alertController setValue:alertControllerMessageStr forKey:@"attributedMessage"];

  

  //修改按钮

  if (![cancelAction valueForKey:@"titleTextColor"]) {

    [cancelAction setValue:[UIColorredColor] forKey:@"titleTextColor"];

  }

  

  [selfpresentViewController:alertController animated:YEScompletion:nil];

}