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attributedPlaceholder

NSString *string = @"手机号";
NSMutableAttributedString *placeholder = [[NSMutableAttributedString alloc] initWithString:string];
[placeholder setAttributes:@{
NSFontAttributeName:[UIFont systemFontOfSize:14],
NSForegroundColorAttributeName:[UIColor whiteColor]
} range:NSMakeRange(0, 2)];
self.loginPhoneNumber.attributedPlaceholder = placeholder;

继承TextField并重写

• (void)drawPlaceholderInRect:(CGRect)rect
  {
  [self.placeholder drawInRect:CGRectMake(0, 10, rect.size.width, 25) withAttributes:@{
  NSFontAttributeName : self.font,
  NSForegroundColorAttributeName : [UIColor grayColor]
  }];
  }

不得姐.gif