- 1.颜色转变成图片
- (UIImage *)createImageWithColor:(UIColor *)color
{
CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}
- 2.app评分跳转
-(void)goToAppStore
{
NSString *str = [NSString stringWithFormat:
@"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%d",547203890];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];
}
- 3.获取当前系统语言环境
NSUserDefaults* defs = [NSUserDefaults standardUserDefaults];
NSArray* languages = [defs objectForKey:@"AppleLanguages"];
NSString* preferredLang = [languages objectAtIndex:0];
- 4.计算字符串的高度
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];
paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
NSDictionary *dicAtt = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:15],NSFontAttributeName,paragraphStyle.copy,NSParagraphStyleAttributeName, nil];
NSAttributedString *attribute = [[NSAttributedString alloc]initWithString:str attributes:dicAtt];
CGRect frame = [attribute boundingRectWithSize:CGSizeMake(200, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:nil];
- 5.强行关闭app的方法
私有API
[[UIApplication sharedApplication] performSelector:@selector(terminateWithSuccess)];
C语言方法
exit(0);