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"];
