一些常用合集

** 好记性不如烂笔头记录一些自己在开发中经常用到的一些琐碎代码片段会经常更新 .. **

1、目前iOS项目中要求导航栏的返回按钮只保留那个箭头，去掉后边的文字，在网上查了一些资料，最简单且没有副作用的方法就是

[UIBarButtonItem appearance]setBackButtonTitlePositionAdjustment:UIOffsetMake(0,-60)] for BarMetrics:UIBarMetricsDefault];

2、简单实现一个导航栏的下的提示视图效果如下

未命名.gif

- (void)showNewStatusesCount:(NSInteger)nums{

    UILabel *label = [[UILabel alloc] init];
    label.font = [UIFont systemFontOfSize:12];
    
    if (nums) {
        label.text = [NSString stringWithFormat:@"新%ld条数据", count];
    } else {
        label.text = @"暂无新数据";
    }
    
    label.backgroundColor = [UIColor colorWithRed:0/255.0  green:174/255.0 blue:22/255.0 alpha:1.0];
    label.textAlignment = NSTextAlignmentCenter;
    label.textColor = [UIColor whiteColor];
    
    label.width = self.view.frame.size.width;
    label.height = 35;
    label.x = 0;
    label.y = CGRectGetMaxY([self.navigationController navigationBar].frame) - label.frame.size.height;
    
    [self.navigationController.view insertSubview:label belowSubview:self.navigationController.navigationBar];

    [UIView animateWithDuration:.8f; animations:^{

        label.transform = CGAffineTransformMakeTranslation(0, label.frame.size.height);

    } completion:^(BOOL finished) { /
       
        [UIView animateWithDuration:duration delay:.8f options:UIViewAnimationOptionCurveEaseInOut animations:^{
            
            label.transform = CGAffineTransformIdentity;
            
        } completion:^(BOOL finished) {
           
            [label removeFromSuperview];
        }];
    }];
}

3、平时有用到更改label的行间距使其排版看起来更美观

屏幕快照 2017-01-17 下午2.25.27.png

一些常用合集

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