[iOS功能]- iOS改变占位符颜色

self.passTF.attributedPlaceholder = [self changePlaceholderWithTextField:self.passTF withString:@"请输入密码"];

- (NSMutableAttributedString *)changePlaceholderWithTextField:(UITextField *)textField withString:(NSString *)string{
    //设置光标颜色
    textField.tintColor = [UIColor whiteColor];
    textField.textColor = [UIColor whiteColor];
    //placeholder前面加入空格
    textField.leftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 42/2/1.5, 0)];
    textField.leftViewMode = UITextFieldViewModeAlways;
    NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc]initWithString:string];
    if (SCREEN_WIDTH == 320) {
        [attributeString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:12.0] range:NSMakeRange(0, string.length)];
    }else{
        [attributeString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:14.0] range:NSMakeRange(0, string.length)];
    }
    //设置placeholder字体的颜色
    [attributeString addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithRed:152/255.0 green:152/255.0 blue:152/255.0 alpha:1] range:NSMakeRange(0, string.length)];
    
    return attributeString;
}