iOS development NSBundle, Uiimageview, and UIButton summary

1.NSBundle

1> a nsbundle represents a folder, with NSBundle access to the corresponding folder

2> can access any resource in the software resource bundle using Mainbundle

Installation path for the 3> emulator application

2.UIImageView and UIButton

1> Use occasions

*uiimageview: If the image is only displayed, you do not need to listen to the image click

*uibutton: That is to display the picture, but also listen to the image of the click

2> the same point: can display the picture

3> different points:

*uibutton can handle click events, Uiimageview cannot handle click events

*uibutton can display both pictures and text

*uibutton can display two pictures at the same time

*uibutton inherits from Uicontrol, so events can be handled by default

*uiimageview inherits from UIView, so events are not handled by default long

iOS development NSBundle, Uiimageview, and UIButton summary