ZHAutoScrollView-解决键盘覆盖 UITextField 的问题
ZHAutoScrollView
ZHAutoScrollView is a smart UIScrollView which can:
Scroll to proper position and make sure the active textField is visible when keyboard is showing
Customize top and bottom margin for textField
Dismiss keyboard when tap on scrollView
Dismiss keyboard on tap "Return"
Support
contentViewand make your life with Auto Layout easier
Preview
Why?
Form views are very common when developing iOS projects. When keyboard is showing up, the big keyboard is covering great areas, which will hide the active textField.
It's kind of annoying to handle scrolling on UIScrollView and it's trivial to write keyboard notification and textField target action code again.
To keep your code DRY and make your life with iOS development easier.
Usage
Just use ZHAutoScrollView as parent view of textFields, or views contain textFields. Add subViews onzhAutoScrollView.contentView (Be sure to add subViews on .contentView), then that's it!
(Note, only textField which is already on the view to be added can be handled, you can manualy add textFields that need to be handled by calling handleTextField: or handleTextFields:)
How it works?
ZHAutoScrollView is a subClass of UIScrollView, some key features are list as following:
contentView
A new property: contentView is added, which is served same purpose as UITableViewCell. All subviews should be added on contentView, this is extremely helpful when dealing Auto Layout with ScrollView (refer:Apple Technical Note TN2154 - UIScrollView And Autolayout)
To let ZHAutoScrollView determine contentSize, let constraints on contentView covers its four edges, so size of contentView is contentSize.
Dismiss keyboard on Tap
ZHAutoScrollView will be attached with a Tap gesture and let you dismiss keyboard by tapping the empty space around textFields.
Dismiss keyboard on "Return"
ZHAutoScrollView will automatically detect textFields on newly added subViews, and add UIControlEditing actions for these textField, it will let you dismiss keyboard when tap "Return".
Compatibility
Works with Auto Layout, not tested on frame based code.
Support iOS7 and above. Not tested on iOS6, since iOS6 supports autolayout, should be fine.