记录几个还算常用的Tips，不定期更新

• 删除文件夹下所有.svn文件
  find . -name ".svn" | xargs rm -Rf
• 删除文件夹下所有.git文件
  find . -name ".git" | xargs rm -Rf
• 防止UILabel被压缩或被拉伸

 [label setContentHuggingPriority:UILayoutPriorityRequired
                           forAxis:UILayoutConstraintAxisHorizontal];
[label setContentCompressionResistancePriority:UILayoutPriorityRequired 
                                         forAxis:UILayoutConstraintAxisHorizontal];

• 滑动时若不希望Timer被ScrollView影响，需添加到NSRunLoopCommonModes

RunLoopMode:

• NSDefaultRunLoopMode : 默认状态、空闲状态
• UITrackingRunLoopMode : 滑动ScrollView时
• UIInitializationRunLoopMode : 私有，App启动时
• NSRunLoopCommonModes : 集合于1和2

NSTimer *timer = [NSTimer timerWithTimeInterval:1.0
                                           target:self
                                         selector:@selector(timerTick)
                                         userInfo:nil 
                                          repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:timer 
                               forMode:NSRunLoopCommonModes];

• UITableView延迟加载图片，防止滑动时卡顿

UIImageView *imageView = [[UIImageView alloc] init];
UIImage *image = [UIImage imageNamed:@"imageIcon"];
[imageView performSelector:@selector(setImage:)
                  withObject:image
                  afterDelay:0
                     inModes:@[NSDefaultRunLoopMode]];

• 解决CG Raster Data内存占用问题

https://github.com/waynezxcv/Gallop/issues/34