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#include <math.h> #define pi 3.14159265358979323846 #define degreesToRadian(x) (pi * x / 180.0) #define radiansToDegrees(x) (180.0 * x / pi) CGFloat distanceBetweenPoints (CGPoint first, CGPoint second) {     CGFloat deltaX = second.x - first.x;     CGFloat deltaY = second.y - first.y;     re ...
  在 NSDate中获得时间信息,年、月、星期、日、时、分和秒: NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDate *now; NSDateComponents *comps = [[NSDateComponents alloc] init]; NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWee ...
  为Sprite添加下面的方法: [[sprite texture ] setAliasTexParameters ];
大致思路使用两层辅助UIView的旋转来实现添加后的View的横向翻页效果     CATransform3D transformA = CATransform3DRotate(CATransform3DIdentity, degreesToRadian(90), 0, 0, 1.0f);     CATransform3D transformB = CATransform3DRotate(CATransform3DIdentity, degreesToRadian(180), 0.0f, 1.0f, 0.0f);     bgview.layer.transform = CATransf ...
先说使用,再给定义 使用方法: - (UITableViewCell *)tableView:(UITableView *)tableView          cellForRowAtIndexPath:(NSIndexPath *)indexPath {         static NSString *CellIdentifier = @"ImageCell";     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];         i ...
Log: Couldn't register com.${appname}.xxx with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger. 解决方法 : 重启设备    
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