OC learning Day1, ocday1

OC learning Day1, ocday1

 

OC Program Development Process

Similar to C:

First OC Program

Second OC Program

Find NSObjCRuntime. h:

Show Package content

Contents → Developer → Platforms

→ IPhoneOS. platform → Developer → SDKS

→ IPhoneOS8.1.sdk → System → Library

→ Frameworks → Foundation. framework → Headers

Third OC Program

Fourth OC Program

Summary

How can I learn PS accurately and in detail?

View the article ps Tips 1. When you need to quickly hide the toolbar and multiple floating panels, click the close button on the panel one by one. It will be very inconvenient to open the toolbar when used later. In fact, you can press the "Shift" and "Tab" keys on the keyboard at the same time, so that the floating panel will immediately hide, disappear from the screen, and press the two keys at the same time, the Panel will appear again; if you only press
The "Tab" key is hidden in the toolbar together with the floating panel. Click the key to display it at the same time. 2. In Photoshop, you often need to modify the set value. Generally, there is a black triangle on the right side of the Value box. Click it to display a sliding ruler. Drag the ruler to modify the value, but sometimes it is not very accurate. At this time, you can press the down arrow key (each click indicates a value plus one) and the up arrow key (each click indicates a value minus one) to adjust the value accurately. If you press and hold the "Shift" Key, each click will increase or decrease the value by 10. 3. When you are using the paint brush tool and want to adjust the opacity, It is very troublesome to open the setting box. In this case, you can press the number key on the disk to set it. For example, when you press "0", the opacity is 100%. The "1" Key is 10%. Press "4" and then "5", then the opacity is 45%, and so on. 4. When we want to copy the selected object in the file, we need to use the copy command in the edit menu. Copy once, you may not feel the trouble, but to copy multiple times, one click is rather inconvenient. In this case, you can select an object with the selection tool, click the move tool, and then press and hold the Alt key. When the cursor turns black and white, the two arrows overlap, drag the mouse to the desired position. To replicate multiple times, just move the mouse over again. 5. when you need to select multiple layers, you can first use the selection tool to select a region in the file, pull a selection dotted box, and then press and hold the "Alt" key, when the cursor changes to a large "+" with a small "-" in the lower right corner (this indicates reducing the selected area or pixel), pull the second box in the first box; then press and hold the "Shift" key. When the cursor changes to a large "+" with a small "+" in the lower right corner, pull the third selection box in the second box, in this way, you can choose multiple layers. In fact, you can use this method to select irregular objects. 6. when editing an image file, we sometimes need to remove the color of the image other than the selected object. In this case, we can press the "De lete" key on the disk to change the color to a background color or transparent color outside the selection area, it depends on what background you set. 7. Remove the turtle pattern from the scan image. Due to printing reasons, some Turtle prints will be displayed when we input images on the computer by scanning. If we edit the images on this basis, the effects will be affected in the future. In this case, you can use the "Despeckle" in the "Noise" filter to process the image, and the image will become slightly blurred; then, use the Sharpen Edge in the Sharpen filter (note that the value should be smaller) and try again. In this case, you can use the zoom-in tool to observe that no turtle lines will appear. Correct Method for learning ps 1. Attitude and purpose
1. to learn pssoftware, we must first make it clear that PS drawing is very different from traditional manual painting, and cannot be regarded as a true class of Painting Art, it is similar to the "painting" in industrial design patterns ". However, we can use it to process the hard-to-achieve effects of manual painting. Its shortcuts are sometimes incomparable. Furthermore, it can work with external devices of many computers to make it more practical.
2. Do not try to draw anything on the canvas. PS is a digital graphics technology.
For example, if you want to draw a pentagram, you can find this pattern in the software. What you need to do is drag, deformation, zoom in and out, fill, change color, and so on.
3. since PS is working on a computer, we should follow the computer-specific operation method at work. for example, we usually draw a moon pattern by hand, draw a convex arc first, and then draw a Concave Arc to form the shape of the moon, but when you use a computer to operate in PS, you should never try the above manual methods to operate, we need to change a kind of thinking, first draw ...... remaining full text>
 
I'm a 23-year-old girl who wants to do a good job in technology. What should I learn? Troubles

Hello!
Your age is so enviable! Girls still need to have a "skill" and learn to use it out of their hobbies. I think the most challenging thing today is "stenographer ". Because your age is good, your mind is sharp, and your movements are fast. The second industry is relatively stable. You can apply for technical skills, or become a teacher and take a course! Isn't that two-pronged? But one thing we need to talk about is "diligence, learning, and perseverance. Young Friends believe in their own strength, and fruitful fruits will always belong to them!