1、設(shè)置TextField的占位符顯示placeholder_attributedPlaceholder

    // 文字屬性
    NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
    attrs[NSForegroundColorAttributeName] = [UIColor grayColor];
    // NSAttributedString : 帶有屬性的文字(富文本技術(shù))
    NSAttributedString *placeholder = [[NSAttributedString alloc] initWithString:@"手機(jī)號(hào)" attributes:attrs];
    self.phoneField.attributedPlaceholder = placeholder;

//    NSMutableAttributedString *placehoder = [[NSMutableAttributedString alloc] initWithString:@"手機(jī)號(hào)"];
//    [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;