UITextField的placeholder颜色的修改

• 使用属性

@property(nonatomic,copy)   NSAttributedString     *attributedPlaceholder;

// 文字属性
NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
attrs[NSForegroundColorAttributeName] = [UIColor grayColor];

// NSAttributedString : 带有属性的文字(富文本技术)
NSAttributedString *placeholder = [[NSAttributedString alloc] initWithString:@"手机号" attributes:attrs];
self.phoneField.attributedPlaceholder = placeholder;

NSMutableAttributedString *placehoder = [[NSMutableAttributedString alloc] initWithString:@"手机号"];
[placehoder setAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]} range:NSMakeRange(0, 1)];
[placehoder setAttributes:@{
                            NSForegroundColorAttributeName : [UIColor yellowColor],
                            NSFontAttributeName : [UIFont systemFontOfSize:30]
                            } range:NSMakeRange(1, 1)];
[placehoder setAttributes:@{NSForegroundColorAttributeName : [UIColor redColor]} range:NSMakeRange(2, 1)];
self.phoneField.attributedPlaceholder = placehoder;

• 重写方法

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

• 使用KVC

[self setValue:[UIColor grayColor] forKeyPath:@"_placeholderLabel.textColor"];