IOS _ draw a Label with strikethrough and ios draw a label

IOS _ draw a Label with strikethrough and ios draw a label

A text label with strikethrough, inherited from UILabel

The steps for self-painting Code are as follows:

1. Override the drawRect method of the control.

2. first obtain the context object

3. Set the color and specify the Fill mode or the Stroke mode.

4. Specify the start point (including x and y) of The strikethrough in the context)

5. Determine the text length (the length of the line to be drawn) based on the font of the label text)

6. Specify the end point (including x and y) of The strikethrough)

7. rendering to the context to complete path Rendering

In iOS development, how can I click a label to move it to a random location, and double-click the label to move it to the desired location?

Add UITapGestureRecognizer gesture in label
UITapGestureRecognizer * singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget: self action: @ selector (handleSingleFingerEvent :)]; singleFingerOne. numberOfTouchesRequired = 1; // hand index singleFingerOne. numberOfTapsRequired = 1; // Number of taps
SingleFingerOne. delegate = self;
[Label addGestureRecognizer: singleFingerOne];
Optional * singleFingerTwo = [[externalloc] initWithTarget: self action: @ selector (handleSingleFingerEvent :)]; singleFingerTwo. numberOfTouchesRequired = 1;
SingleFingerTwo. numberOfTapsRequired = 2;
SingleFingerTwo. delegate = self;
[Label addGestureRecognizer: singleFingerTwo];
[SingleFingerOne requireGestureRecognizerToFail: singleFingerTwo]; // Add this sentence to avoid responding to the click event when you double-click the event.

In the callback, you can determine the number of taps.
-(Void) handleSingleFingerEvent :( UITapGestureRecognizer *) sender
{
If (sender. numberOfTapsRequired = 1 ){
// Single-finger click
NSLog (@ "Single-finger click ");
} Else if (sender. numberOfTapsRequired = 2 ){
// Double-click
NSLog (@ "Single-finger double-click ");
}
}
Let me try this first.

How does ios make the content in the label adaptive label size?

The wordbreak and wordrape attributes are misspelled at the same time, but it is estimated that the solution Label will not automatically wrap the lines, and the height can only be set based on the character size, however, because the input is random, such as punctuation or Chinese and English characters, and the length is different, it is very difficult to set the height. It is recommended that the LZ method be used to save the content solution as if the label would not