Xcode 用于4.3支持警告的presentModalViewController

在iOS 4.3及更高版本中包含presentModalViewController的代码中有一个问题

当iOS版本支持presentModalViewController和presentViewController时，我使用以下代码来使用它们。（摘自@Stackoverflow的帖子）

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当我在>5.0和中测试它时，上面的功能非常好，可能处于第二种情况，您应该请求响应presentModalViewController，而不是presentViewController

你的代码

if([self respondsToSelector:@selector(presentViewController:animated:completion:)])
    [self presentViewController:myView animated:YES completion:^{/* done */}];
else if([self respondsToSelector:@selector(**presentViewController:animated**:)])
    [self presentModalViewController:myView animated:YES];
else

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您好，谢谢您的帮助。我最终通过删除4.3 iOS支持并移动到5.0+并仅使用

presentModalViewController

解决了这个问题。

if (![defaults boolForKey:@"everLaunched"]) {
    //NSLog(@"First run");
if([self.viewController respondsToSelector:@selector(presentViewController:animated:completion:)])
        [self.viewController presentViewController:infoView animated:YES completion:^{/* done */}];
    else if([self.viewController respondsToSelector:@selector(presentViewController:animated:)])
       [self.viewController presentModalViewController:infoView animated:YES];
    else
        NSLog(@"1Oooops, what system is this !!! - should never see this !");

Unbalanced calls to begin/end appearance transitions for <ViewController: 0x689da90>.

if([self respondsToSelector:@selector(presentViewController:animated:completion:)])
    [self presentViewController:myView animated:YES completion:^{/* done */}];
else if([self respondsToSelector:@selector(**presentViewController:animated**:)])
    [self presentModalViewController:myView animated:YES];
else