UITextField 相关

1. Placeholder 的颜色和字体

 

@implementation DZCustomTextField
// 设置Placeholder
- (void)customWithPlaceholder: (NSString *)placeholder color: (UIColor *)color font: (UIFont *)font {

  // 方法一：修改attributedPlaceholder;
    self.attributedPlaceholder = [NSAttributedString attributedStringWithString:placeholder color:color font:font];

// 方法二：使用KVC,最为简单
//    self.placeholder = placeholder;
//    [self setValue:color forKeyPath:@"_placeholderLabel.color"];
//    [self setValue:font forKeyPath:@"_placeholderLabel.font"];
}

// 重写这个方法是为了使Placeholder居中，如果不写会出现类似于下图中的效果，文字稍微偏上了一些
- (void)drawPlaceholderInRect:(CGRect)rect {
    [super drawPlaceholderInRect:CGRectMake(0, self.height * 0.5 - 1, 0, 0)];
}

@end