在使用UITextView的時候遇到一個bug，自動換行的時候會光標會不停的跳動，并且文字無法顯示完全，最后找到解決方法：

// ios7 bug fix

//?check?if?the?device?is?running?iOS?7.0?or?later

NSString?*reqSysVer?=?@"7.0";

NSString?*currSysVer?=?[[UIDevice?currentDevice]?systemVersion];

BOOL?osVersionSupported?=?([currSysVer?compare:reqSysVer? options:NSNumericSearch]?!=?NSOrderedAscending);

if?(osVersionSupported)?{

NSTextStorage*?textStorage?=?[[NSTextStorage?alloc]?init];

NSLayoutManager*?layoutManager?=?[NSLayoutManager?new];

[textStorage?addLayoutManager:layoutManager];

NSTextContainer?*textContainer?=?[[NSTextContainer?alloc]?initWithSize:self.view.bounds.size];

[layoutManager?addTextContainer:textContainer];

yourTextView?=?[[UITextView?alloc]?initWithFrame:someFrameForYourTextView

textContainer:textContainer];

//?if?using?ARC,?remove?these?3?lines

[textContainer?release];

[layoutManager?release];

[textStorage?release];

}

else

yourTextView?=?[[UITextView?alloc]?initWithFrame:someFrameForYourTextView];