需要加深颜色,或者改变颜色
示例:
核心代码
方法一:通过attributedPlaceholder属性修改占位文字颜色
CGFloat viewWidth = self.view.bounds.size.width; CGFloat textFieldX = 50; CGFloat textFieldH = 30; CGFloat padding = 30; UITextField *textField = [[UITextField alloc] init]; textField.frame = CGRectMake(textFieldX, 100, viewWidth - 2 * textFieldX, textFieldH); textField.borderStyle = UITextBorderStyleRoundedRect; // 边框类型 textField.font = [UIFont systemFontOfSize:14]; NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:@"请输入占位文字" attributes: @{NSForegroundColorAttributeName:[UIColor redColor], NSFontAttributeName:textField.font }]; textField.attributedPlaceholder = attrString; [self.view addSubview:textField];方法二:通过KVC修改占位文字颜色
UITextField *textField1 = [[UITextField alloc] init]; textField1.frame = CGRectMake(textFieldX, CGRectGetMaxY(textField.frame) + padding, viewWidth - 2 * textFieldX, textFieldH); textField1.borderStyle = UITextBorderStyleRoundedRect; textField1.placeholder = @"请输入占位文字"; textField1.font = [UIFont systemFontOfSize:14]; // "通过KVC修改占位文字的颜色" [textField1 setValue:[UIColor greenColor] forKeyPath:@"_placeholderLabel.textColor"]; [self.view addSubview:textField1];方法三:通过重写UITextField的drawPlaceholderInRect:方法修改占位文字颜色
// 重写此方法-(void)drawPlaceholderInRect:(CGRect)rect { // 计算占位文字的 Size CGSize placeholderSize = [self.placeholder sizeWithAttributes:@{NSFontAttributeName : self.font}]; [self.placeholder drawInRect:CGRectMake(0, (rect.size.height - placeholderSize.height)/2, rect.size.width, rect.size.height) withAttributes: @{NSForegroundColorAttributeName : [UIColor blueColor], NSFontAttributeName : self.font}];}总结: