objective-c图片数组寄存空
objective-c图片数组存放空
NSMutableArray *imgSheet=[NSMutableArray arrayWithCapacity:4];
for(int i=0;i<4;i++){
[imgSheet addObject:[NSNull null]];
}
NSMutableArray *imgSheet=[NSMutableArray arrayWithCapacity:4];
for(int i=0;i<4;i++){
[imgSheet addObject:[NSNull null]];
}