IOS UILabel 文字过长处理
一直没有注意到UILabel 的各种属性,没有深入研究过,今天做定位功能的时候遇到了问题,所以记下来,以便以后再次遇到,还需要查阅资料
我们看到上图中间navigationItem.titleView 是由一个背景View 和 三个控件(imageView ,Label ,imageView)组成的
我们的需求是,俩imageView 分别在Label左右侧等距离 而当 Label的width>= 160的时候,显示Label 多余文字...
我是这样实现的哦
//中
UIView *navTitleView = [[UIView alloc] initWithFrame:KCGRect(0, 0, 180, 16)];
locationLabel = [[UILabel alloc] initWithFrame:KCGRect(16, 0, 148, 16)];
locationLabel.textAlignment = NSTextAlignmentCenter;
locationLabel.text = @"点击定位您的位置";
locationLabel.textColor = [UIColor whiteColor];
locationLabel.font = [UIFont systemFontOfSize:16.0];
[locationLabel sizeToFit];
//这里用到一个UIExit第三方类,可以直接获取width
if (locationLabel.width >= 160) {
locationLabel.lineBreakMode = NSLineBreakByTruncatingMiddle;
locationLabel.width = 160;
}
locationLabel.center = navTitleView.center;
UIImageView *fisrtImageView = [[UIImageView alloc] initWithFrame:KCGRect(0, 0, 16, 16)];
fisrtImageView.userInteractionEnabled = YES;
fisrtImageView.image = [UIImage imageNamed:@"[email protected]"];
fisrtImageView.right = locationLabel.left - KCGRectWithx(10.0);
UIImageView *secondImageView = [[UIImageView alloc] initWithFrame:KCGRect(162, 0, 16, 16)];
secondImageView.left = locationLabel.right +KCGRectWithx(10.0);
secondImageView.image = [UIImage imageNamed:@"[email protected]"];
//定位完成之后,将locationButton重新赋值
[navTitleView addSubview:locationLabel];
[navTitleView addSubview:secondImageView];
[navTitleView addSubview:fisrtImageView];
self.navigationItem.titleView = navTitleView;
是我浅薄了啊,查了一圈才想到
typedef NS_ENUM(NSInteger, NSLineBreakMode) { /* What to do with long lines */
NSLineBreakByWordWrapping = 0, /* Wrap at word boundaries, default */
NSLineBreakByCharWrapping, /* Wrap at character boundaries */
NSLineBreakByClipping, /* Simply clip */
NSLineBreakByTruncatingHead, /* Truncate at head of line: "...wxyz" */
NSLineBreakByTruncatingTail, /* Truncate at tail of line: "abcd..." */
NSLineBreakByTruncatingMiddle /* Truncate middle of line: "ab...yz" */
} NS_ENUM_AVAILABLE_IOS(6_0);