于ios7在遇到一些发展deprecated问题

cell.textLabel.textAlignment = UITextAlignmentCenter;

现在我想写cell.textLabel.textAlignment =NSTextAlignmentCenter;

UITableViewCell *cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:nil] autorelease];

须要写成

static NSString *TableSampleIdentifier =@"TableSampleIdentifier";

 UITableViewCell *cell = [[UITableViewCellalloc]initWithStyle:UITableViewCellStyleValue1reuseIdentifier:TableSampleIdentifier];

 [selfpresentModalViewController:calendarViewanimated:YES];

改成  [selfpresentViewController:calendarViewanimated:YEScompletion:^{}];

新接口的区别是提供了一个參数，同意你传入一个block。这个block的回调方法在VC的viewWillDisappear方法后调用。也就是被隐藏的VC对象被释放后执行回调。

这样做的优点：能够方便做多个UI效果之间的衔接和转换。

在IOS7的PageControl控件

调用[self.subviewsobjectAtIndex:i]

取出的不是UIImageView而是UIView

所以updateDots方法应该这样写:

-(void) updateDots{ for (int i = 0; i < [self.subviews count]; i++) { UIView* dotView = [self.subviews objectAtIndex:i]; if ([dotView isKindOfClass:[UIImageView class]]) { UIImageView* dot = (UIImageView*)dotView; if (i == self.currentPage) dot.image = _activeImage; else dot.image = _inactiveImage; }else{ if (i == self.currentPage) [dotView setBackgroundColor:[UIColor colorWithPatternImage:_activeImage]]; else [dotView setBackgroundColor:[UIColor colorWithPatternImage:_inactiveImage]]; } } }

[text drawAtPoint:textPt withFont:[UIFontsystemFontOfSize:14.0f]]

在IOS7中应该写

#define NLSystemVersionGreaterOrEqualThan(version) ([[[UIDevice currentDevice] systemVersion] floatValue] >= version) #define IOS7_OR_LATER NLSystemVersionGreaterOrEqualThan(7.0) if (IOS7_OR_LATER) { UIFont* font = [UIFont preferredFontForTextStyle:UIFontTextStyleBody]; font = [font fontWithSize:14.0f]; [text drawAtPoint:textPt withAttributes:@{NSFontAttributeName:font}]; }else { [text drawAtPoint:textPt withFont:[UIFont systemFontOfSize:14.0f]]; }

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转载于:https://www.cnblogs.com/bhlsheji/p/4829906.html