TextField的Placeholder的顏色設置

第一種方法實現：

一、自定義ZZPlaceholderColorTextField集成於UITextField

二、

- (void)drawRect:(CGRect)rect {
    self.tintColor = [UIColor whiteColor];
    
    NSMutableDictionary *attrs = [NSMutableDictionary dictionaryWithCapacity:1];
    attrs[NSForegroundColorAttributeName] = [UIColor whiteColor];
    
    self.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeholder attributes:attrs];
    
    
    // Drawing code
}

第二種方法實現：

二、

- (void)drawRect:(CGRect)rect {
    self.tintColor = [UIColor whiteColor];
    
    
    // Drawing code
}

#pragma mark 重寫drawPlaceholderInRect方法
- (void)drawPlaceholderInRect:(CGRect)rect {
   
    NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
    attrs[NSForegroundColorAttributeName] = [UIColor whiteColor];
    attrs[NSFontAttributeName] = self.font;
     /*
    //畫出佔位符
    CGRect placeholderRect;
    placeholderRect.size.width = rect.size.width;
    placeholderRect.size.height = rect.size.height;
    placeholderRect.origin.x = 0;
    placeholderRect.origin.y = (rect.size.height - self.font.lineHeight) * 0.5;
    [self.placeholder drawInRect:placeholderRect withAttributes:attrs];
    */
    //或者

     CGPoint placeholderPoint = CGPointMake(0, (rect.size.height - self.font.lineHeight) * 0.5);
     [self.placeholder drawAtPoint:placeholderPoint withAttributes:attrs];
    
}