9.是否允许推送
+(BOOL)isAllowedNotification{
if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
UIUserNotificationSettings *setting = [[UIApplication sharedApplication] currentUserNotificationSettings];
if(UIUserNotificationTypeNone != setting.types) {
return YES;
}
}
NSLog(@"不允许推送");
return NO;
}
10.磁盘空间相关
+ (NSString *)memoryFormatter:(long long)diskSpace {
NSString *formatted;
double bytes = 1.0 * diskSpace;
double megabytes = bytes / MB;
double gigabytes = bytes / GB;
if (gigabytes >= 1.0)
formatted = [NSString stringWithFormat:@"%.2f GB", gigabytes];
else if (megabytes >= 1.0)
formatted = [NSString stringWithFormat:@"%.2f MB", megabytes];
else
formatted = [NSString stringWithFormat:@"%.2f bytes", bytes];
NSLog(@"fotmatted=%@",formatted);
return formatted;
}
+ (NSString *)totalDiskSpace {
long long space = [[[[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:nil] objectForKey:NSFileSystemSize] longLongValue];
return [self memoryFormatter:space];
}
+ (NSString *)freeDiskSpace {
long long freeSpace = [[[[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:nil] objectForKey:NSFileSystemFreeSize] longLongValue];
return [self memoryFormatter:freeSpace];
}
11.修改了leftBarButtonItem如何恢复系统侧滑返回功能
//设置代理
self.interactivePopGestureRecognizer.delegate = self;
#pragma mark - <UIGestureRecognizerDelegate>
//实现代理方法:return YES :手势有效, NO :手势无效
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
//当导航控制器的子控制器个数 大于1 手势才有效
return self.childViewControllers.count > 1;
}
或者用第三方 UINavigationController+FDFullscreenPopGesture
12.使用UIAppearance在某个状态下设置颜色,字体等不好使
只需要在对应的位置用layoutIfNeeded刷新一下就可以了
13.设置圆形图片
/** 设置圆形图片(放到分类中使用) */
- (UIImage *)cutCircleImage {
UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0);
// 获取上下文
CGContextRef ctr = UIGraphicsGetCurrentContext();
// 设置圆形
CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
CGContextAddEllipseInRect(ctr, rect);
// 裁剪
CGContextClip(ctr);
// 将图片画上去
[self drawInRect:rect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
14.如果在xib中有一个控件, 已经明确设置尺寸了,输出的frame也是对的, 但是显示出来的效果不一样(比如尺寸变大了), 如果是这种情况一般就是autoresizingMask自动伸缩属性在搞鬼!
