方法一.

-(CGRect)imageRectForContentRect:(CGRect)contentRect {
    return CGRectMake(self.width - kImageW, 0, kImageW, self.height);
}
-(CGRect)titleRectForContentRect:(CGRect)contentRect {
    return CGRectMake(0, 0, self.width - kImageW, self.height);
}

方法二.

- (void)layoutSubviews {
    [super layoutSubviews];
    self.textLabel.frame = CGRectMake(0, 0, self.width, self.height);
}