@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(30, 100, 160, 30)];
    
    textField.text = @"設置textField下邊框";
    CALayer *bottomBorder = [CALayer layer];
    bottomBorder.backgroundColor = [UIColor orangeColor].CGColor;
    bottomBorder.frame = CGRectMake(0.0f, textField.frame.size.height - 1, textField.frame.size.width, 1.0f);
    bottomBorder.backgroundColor = [UIColor blackColor].CGColor;
    [textField.layer addSublayer:bottomBorder];
    [self.view addSubview:textField];
    [self.view setBackgroundColor:[UIColor lightGrayColor]];
}

@end

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