我有一个继承自UIView并符合UIKeyInput的类*.h*@interfaceUIKeyInputExampleView:UIView{NSMutableString*textStore;}@property(nonatomic,retain)NSMutableString*textStore;@end.m@implementationUIKeyInputExampleView@synthesizetextStore;-(id)initWithFrame:(CGRect)frame{if((self=[superinitWithFrame:frame])){//Initializ